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THE IMPACTS OF 0.8. FISCAL POLICIES ON
AGRICULTURE
BY
Young Chan Choe
A DISSERTATION
Submitted to
Michigan State University
in partial fulfillment of the requirements
for the degree of
DOCTOR OF PHILOSOPHY
Department of Agricultural Economics
1991
ABSTRACT
THE IHPACTS O! 0.8. I'ISCAL POLICIES ON AGRICULTURE
BY
Young Chan Choe
Macroeconomists have different opinions on how fiscal
policy affects the economy in general. Not surprisingly, these
different views have also resulted in wide disagreements on
how fiscal.policies affect agriculture. Schuh (1981, 1983) and
Barclay and Tweeten (1988) , following the Keynesian
hypothesis, have argued that an increase in the federal
deficit causes unfavorable conditions for the farm economy by
decreasing farm prices. On the other hand, Belongia and Stone
(1985) and Batten and Belongia (1986) have rejected any
possible connection between the federal deficit and farm
prices, based on a New Classical macroeconomic model. Applying
the neo-Keynesian differential price adjustment, Rausser
(1985) and Rausser, Chalfant, Love and Stamoulis (1986) have
argued that the federal deficit, due to sticky industrial
prices, has the same short run impact on the farm economy as
tight monetary policy, which implies a decrease in farm
prices. Just and. Chambers (1987) also applied. the neo-
Keynesian hypothesis, but considered farm prices as sticky as
a result of price supports.
This study attempts to resolve these differing views with
a detailed empirical analysis of the effects of U.S. fiscal
policies on agriculture. Minimally restricted time series
Young Chen Choe
models, in the form of vector autoregressions and error
correction models, are used so that alternative theories of
how agriculture responds to fiscal policies can be tested
rather than imposed a priori. Results support the arguments
of Rausser (1985) and others that the federal deficit
decreases farm prices in the short run without affecting
industrial.prices. Thus, the farm economy suffers,a cost.price
squeeze in the short run. However, farm prices move back to
their long run equilibrium price level after an initial fiscal
shock, reaching equilibrium after about two or three years.
Thus, no long run changes in the relative position between
farm prices and industrial prices are detected. The short run
impact of the federal deficit occurs mainly through its
effects on interest rates and the exchange rate.
Results from simulating the model over a five year period
suggest that spending reductions are the most desirable form
of deficit reduction from the general macroeconomic
perspective, as spending reductions have little impact on
total output or the general price level. A tax increase
results in a slump in both the macroeconomy and the farm
sector. Monetization of the deficit favors the farm sector
initially because there is a short run increase in farm
prices. However, monetization does not affect the relative
price of farm and industrial goods in the long run, and
induces inflation and a decrease in real output after its
initial expansionary effects.
ACKNOWLEDGEMENTS
I wish to express my sincere appreciation to my major
professor, Dr. Robert J. Myers, for his valuable guidance and
counseling throuout author's graduate program and thesis
writing. My special thanks also go to Professors Glenn L.
Johnson, Lindon J. Robison, James F. Oehmke, and Richard T.
Baillie, for their interest, ideas, and comments on the
research. I would like to extend my gratitude to the
Department of Agricultural Economics for continued financial
support. Extra special thanks go to my parents for providing
this opportunity and my wife, Hye Sun Lee, for her love.
iv
TABLE OF CONTENTS
Chapter
I INTRODUCTION
II ISSUES AND CONTROVERSIES
III
IV
1. Fiscal Policies in the Keynesian Paradigm
2. Fiscal Policies in the New Classical Paradigm
3. Fiscal Policies in the Neo-Keynesian Paradigm
4. Empirical Tests of the Effects of Fiscal Policy
5. Fiscal Policies and Agriculture
MODELS AND RESEARCH METHODS
1. Models Used in Empirical Macroeconomics
Page
12
18
24
28
33
33
1.1. The Traditional Simultaneous Equations Model 33
1.2. The Rational Expectations Model
1.3. Unconstrained Vector Autoregressions
2. Extensions of the VAR Approach
2.1. Identifying Contemporaneous Correlatons
2.2. Considerations of Structural Change
2.3. Unit Roots
2.4. Cointegration and Error Correction Models
2.5. Restrictions on Cointegrating Vectors
2.6. Error Regressive Models
3. Methods Used in This Study
PRELIMINARY ANALYSIS
1. Variables and Data
2. Unit Root Tests
3. Cointegration Tests
4. Money Market Equilibrium
5. Exchange Rate Equilibrium
A VAR MODEL OF FISCAL POLICY IMPACTS
ON AGRICULTURE
1. Reduced Form Specification
2 Structural Form Identification
36
38
42
42
45
47
53
58
6O
63
65
65
66
76
80
88
98
98
108
vi
3. Dynamic Responses and
Fore
4. Sens
4.1.
4.2.
4.3.
5. Impl
cast Error Variance Decomposition
itivity Analysis
Structural Identification
Lag Order
Model Specification
ications from the Analysis
VI COMPARISON OF DEFICIT REDUCTION POLICIES
1. Impact of Deficit Reduction Options
on Agriculture
2 P011
cy Simulations
VII SUMMARY AND CONCLUSION
APPENDIX A.
B.
C.
D.
E.
BIBLIOGRAPHY
Data Sources
Definition and Critical Values for
Phillips-Perron Test Statistics
Critical Values for Schmidt-Phillips
Test Statistics
Critical Values for Johansen-Juselius
Cointegration Test Statistics
LM Test of Contemporaneous Correlation
112
116
116
120
120
126
128
128
132
137
141
143
146
147
148
149
LIST OF TABLES
TABLES
1 Results of DF Test for One Unit Root
2 Results of DF Test for Two Unit Roots
3 Results of DP Test for Three Unit Roots
4 Results of DP Test for Two Unit Roots
5 Results of PP Test for One Unit Root
6 Results of SP Test for One Unit Root
7 Autocorrelations of Level Series
8 Autocorrelations of First Differenced Series
9 Lag Selection for AM, AR, AY, AP, AX, and AF
10 JJ Test Results for M, R, Y, P, X, and F
11 Lag Selection for AM, AY, and AR
12 JJ Test Results for M, Y, and R
13 Eigenvalues and Eigenvectors for M, Y, and R
14 Test Results for the Velocity Restriction
15 Lag Selection for AX, AP, and AF
16 JJ Test Results for X, P, and F
17 Eigenvalues and Eigenvectors for X, P, and F
18 Test Results for the Exchange Rate Restriction
19 Lag Selection for AD, AZ“, and AZx
20 Test Results for Structural Change
vii
Page
68
69
71
72
73
74
75
77
78
79
82
83
84
86
92
93
94
95
99
100
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
viii
Historical Decomposition of D
Historical Decomposition of ZM
Historical Decomposition of zx
JJ Test Results for D, ZM' X, P, and F
Eigenvalues and Eigenvectors for D, ZM' X, P,
and F
Lag Selection for AD, AZM, AX, AP, and AF
Summary Statistics for Five Variable ERM
Estimates of Cotemporaneous Parameters in
D-P-X-F-zM Recursive Structure
Decomposition of Forecast Error Variance
Estimates of Cotemporaneous Parameters in
a Simultaneous Structure
JJ Test Results for D, M, R, Y, P, X, and F
Eigenvalues and Eigenvectors for D, M, R, Y, P, X,
and F
JJ Test Results for G, T, M, R, Y, P, X, and F
Eigenvalues and Eigenvectors for G, T, M, R, Y, P,
X, and F
Data Sources
Critical Values for PP Test Statistics
Critical Values for SP Test Statistics
Critical Values for JJ Test Statistics
102
103
104
105
106
107
109
111
115
119
121
122
129
130
141
145
146
147
LIST OF FIGURES
Deficit and Money Supply
Farm Price, Export, and Income
Fiscal Policy in the Keynesian Paradigm
Fiscal Policy in the New Classical Paradigm
Interest Rate, Exchange Rate, and Inflation rate
Plots of Each Series
Actual and Equilibrium Real Money Balances
Actual and Equilibrium Farm Prices
FIGURES
1 Federal
2
3
4
5
6
7
8
9 Impulse
10 Impulse
11 Impulse
12 Impulse
13 Effects
14 Effects
15 Effects
Response Function by ERM with D-P-X-F-ZM
Response Function by ERM with F-D-P-X-ZM
Response Function by Seven Variable ECM
Response Function by Eight Variable ECM
of Spending Reduction
of Tax Increase
of Monetization
ix
Page
10
14
25
67
87
97
113
117
124
131
133
134
135
CHAPTER I
INTRODUCTION
Agricultural economists.havejpaid.considerable attention
to the macroeconomics of agriculture since Schuh (1974) first
considered the exchange rate as an important factor affecting
the farm.economyu Most attention has focused on.exchange rates
and the effects of monetary policy on agriculture (Shei and
Thompson, 1981; Chambers and Just, 1981; Belongia and King,
1983; Rausser, 1985; Orden, 1983, 1986). Recently, however,
the U.S. economy has experienced large federal budget deficits
and a number of agricultural economists have tried to relate
the depressed farm economy in the early 19805 to these
deficits (Schuh, 1981, 1983, 1984b; Rausser, 1985; Rausser,
Chalfant, Love, and Stamoulis, 1986; Belongia.and Stone, 1985;
Batten and Belongia, 1986; Just and Chambers, 1987).
Schuh (1981, 1983, 1984a, 1984b) discussed some potential
effects of fiscal policy on agriculture. The federal deficit,
in his view, tends to increase interest rates and hence the
exchange rate. Agriculture, an export oriented sector, will
suffer from the resulting reduction in exports, prices, and
income. Schuh's conjecture brought immediate responses from
the agricultural economics profession. Barclay and TWeeten
(1988) supported Schuh's conjecture. Their simulation analysis
2
resulted in a negative impact of the federal deficit on farm
exports and. prices ‘through increased. interest. rates and
exchange rates. Rausser, Chalfant, Love, and Stamoulis (1986)
supported the conjecture only in the short run, with no long
run impact from fiscal policy. On the other hand, Just and
Chambers (1987) claimed in their theoretical work that the
federal deficit stimulates the farm economy. However, Belongia
and Stone (1985) , and Batten and Belongia ( 1986) found no
evidence of causality from federal deficit changes to
agriculture in their empirical work.
Controversy over the effects of federal budget deficits
on agriculture implies varying policy recommendations under
the current huge deficit regime. Just and Chambers (1987)
argued.for’a reduction of government spending in other sectors
as the most favorable approach to agriculture for reducing the
federal deficit. Alternatives were a monetary expansion and
a tax increase. Belongia and Stone (1986) argued that focusing
attention on deficit reduction measures diverts attention from
more fundmental changes required in farm commodity programs.
However, Rausser, Chalfant, Love, and Stamoulis (1986) argued
for the dominance of macroeconomic policies over farm policies
in influencing the farm.economy in short run. The.role of farm
policies is confined only to reducing instability in farm
prices and not to providing incentives for overallocation of
resources to agricultural production. They suggest that
frequent use of sectoral policies only brings more instability
3
in the farm economy. Barclay and Tweeten (1988) defined
optimal policy as a balanced budget and payment position,
keeping no interest rate differentials between foreign and
domestic economies.
This study considers some issues surrounding the impact
of fiscal policy on agriculture. The primary objective is to
test empirically the different explanations of how the federal
deficit affects agriculture. Attention will be given to the
significance and the persistence of federal deficit changes
on farm prices. The mechanisms through which the impact of
federal deficit changes get transferred to agriculture will
also be considered.
The second objective of the study is to provide broad
guidelines for policy under current economic conditions. The
effects of changes in government spending, taxation, and
monetization of the deficit on agriculture are examined. The
performance of different deficit reduction policies will be
considered against the alternative of maintaining the status
quo.
Three different models, the simultaneous equations model
(SEM), the rational expectations model (REM), and the vector
autoregression model (VAR), have been used in empirical
macroeconomic policy analysis. In this paper, the VAR model
pioneered by Sims (1980) is used rather than a SEM or a REM
model. VAR models employ only minimal restrictions on the
dynamics of the variables being investigated, where other
4
models incorporate large numbers of overidentifying
restrictions on the model structure. Tests of stationarity,
cointegration, and structural changes will be applied to
selected data to assist in specification of the reduced form
VAR model. Then, the relationS‘ between contemporaneous
variables will be used to identify the structural form VAR.
Given certain identification restrictions, impulse
response functions and decompositions of forecast error
variance can be used to identify how fiscal policy affects
agriculture. Forecasts under the current economic structure
will provide a base projection for the time path of each
variable in the system. Finally, alternative time paths for
each variable under different policy scenarios will be
simulated and compared to the base projection.
In the next chapter, the role of fiscal policies in
agriculture ‘will be stressed by looking at. key summary
statistics. Then, the major issues and controversies
surrounding fiscal policies and agriculture will be discussed
by reviewing the current literature. Chapter III provides
details of the :methods employed. herein. In chapter IV,
variables are defined and stationarity of data. will be
checked. In chapter V, an empirical model is fitted to data
for the selected variables and the impact of fiscal policy on
agriculture will be traced out. Given these estimation
results, chapter VI identifies alternative policy measures for
reducing the current federal budget deficit and compares them
5
through simulation analysis. Chapter VII will provide a brief
summary of findings and conclude the study’ with a few
suggestions for future research.
CHAPTER II
ISSUES AND CONTROVERSIES
Budget deficits in the United States became a major issue
for economists when they rose to an average of $206.7 billion
per year between 1982 and 1986. Deficits, which fluctuated
through the 19705, suddenly grew to alarming levels in the
19805 (see Figure 1). At the same time, agriculture
experienced a prolonged recession. The price of farm products
decreased by an average of 2% per year in the early 19805 and
real net farm income declined by 15% per year. Furthermore,
the value of farm exports fell by an average 8% per year
between 1980 and 1986 (see Figure 2).
Recently, a number of agricultural economists have tried
to relate the depressed farm economy in the early 19805 to the
growing federal budget deficits (Rausser, 1985; Belongia and
Stone, 1985; Just and Chambers, 1987). However, their
explanations are controversial and little has been done to
test alternative theories empirically. Before turning to
empirical tests, however, it is important to get a better
perspective on the theoretical relationship between fiscal
policies and the farm economy. To’this end, the current status
of macroeconomic theories on fiscal policy is first
summarized. Then, the impact of fiscal policies on agriculture
will be discussed within the context of these macroeconomic
theories.
7005-. ‘ /
eoo-l- /
ZOO '1
\.
\
\
\
3
4» ;—5T —. 1t ; ; .
1970 1975 1980 1985
‘ _A A A
A ‘ A... A 9‘—
::}:"_r T_ '
Federal Deficits (Bil. of Dollars)
_ _ Money Supply (Bil. of Dollars)
Figure 1. Federal Deficit and Money Supply
700-1-
e004-
100-1)-
. U
1980
Federal Deficits (Bil. of Dollars)
_ _ _ Money Supply (Bil. of Dollars)
Figure 1. Federal Deficit and Money Supply
1985
70
so"
401-
301?
204-
ioir
L_ l L L k A L L __L__ .1 J L. .1_ L L P
r
L
V '— V r U 1 U iii
1975 1980 1985
1970
Farm Prices (Index of Prices Received by
Farmers, 1977=10)
__ __ Agricultural Exports (Mil. of Dollars)
_{_ Real Farm Income (Bil. of 1982 Dollars)
Figure 2. Farm Price, Export, and Income
9
1. Fiscal Policy in the Keynesian Paradigm
In a Keynesian economy, an expansionary fiscal policy
(increase in government expenditure or reduction in taxes)
shifts the IS curve out from ISO to IS1 (Figure 3). This
causes equilibrium output to increase from Yo to Y1 and the
price level to increase from pc to p1. The real money stock,
Ms/P, decreases because of higher prices causing the LM curve
to move up to LMl. The interest rate increases from ro to r2
and investment drops, pulling the output level back to Y2.
Overall, the output, price, and interest rate of the economy
are all increased in both nominal and real terms. Tight fiscal
policy (decrease in government expenditure or increase in
taxes) will move each of these variables in the opposite
direction.
While increasing government expenditure can help to
produce an initial economic boom, different ways of financing
the expenditure have different effects in a Keynesian economy.
Following Branson (1979) and Canto and Rapp (1982), the
federal government has three distinct alternatives to finance
increased expenditure. First, the government can increase
taxes. A tax increase obviously will offset the initial
stimulative effect of government spending by shifting the IS
curve back towards the origin.
Second, the government expenditure can be financed by
selling bonds to the public. The resulting increase in federal
10
I I I
Y0 Y2 Y1
Goods and Money Markets
\I I l/ L‘.
Li
“a
w. "”L:
we
L1
I
S
Pea
. --a-o
is D.
De
Goods Market
Figure 3. Fiscal Policy in the Keynesian Paradigm
11
debt bids up interest rates, thus choking private investment
and reducing income. The high interest rates also will induce
inflows of foreign capital which will bid up the value of
dollar. The strong dollar makes exports more expensive and
imports cheaper. Exports will fall and imports will expand.
High interest rates also induce a release of commodity stocks
to the market, because interest costs are an important
component of the total costs of carrying stocks. Thus, the
supply of commodities shifts to the right. All of these
effects partially offset the stimulative effect of the IS
shift caused by increased government spending.
Third, the government can finance the deficit by selling
bonds to the monetary authority. The deficit in this case is
financed by additional money creation which shifts the LM
curve out. This causes a decrease in interest rates, an
increase in income, and an increase in the price level. In
this case, secondary effects reinforce the initial
expansionary effect on the economy. This method is frequently
referred to as "monetization" of the deficit.
Although the effect of increased government expenditure
with monetization is always expansionary in a Keynesian
economy, it is not always true that increased government
expenditure will be expansionary without monetization. Tobin
(1969) argued that non-monetized deficits are still
expansionary, because the magnitude of the initial
expansionary effect is greater than the magnitude of the
12
offsetting secondary contractionary effect. Brunner and
Meltzer (1972) and Blinder and Solow (1973) argued not only
that debt financed government expenditure is expansionary, but
also that it is more expansionary than monetization of the
expenditure. They show that higher incomes offset higher
interest payments and hence stabilize the economy. However,
Silber (1970) argues for the reverse case that non-monetized
deficits are not expansionary.
The Keynesian paradigm is based on the disequilibrium
assumption that markets do not always clear immediately, due
to stickiness or slow adjustment processes in the labor
market. Both the size of the budget and the method of
financing the expenditure affect real output.and prices in the
economy (Tobin, 1969; Brunner and Meltzer, 1972; Tobin and
Buiter, 1974; Blinder and Solow, 1973; CEASM, 1978; Branson,
1979; Feldstein, 1982).
2. Fiscal Policies in the New Classical Paradigm
Tatom (1985) described ex-ante crowding out and the
permanent income hypothesis as two important theoretical
considerations from classical economics. Carlson and Spencer
(1975) defined crowding out as a steady state government
spending multiplier (changes of nominal income by a unit
change in government spending given a constant money supply)
of near zero. Canto and Lapp(1982) defined crowding out as a
13
government expenditure multiplier of less than one and full
crowding out as a multiplier of zero. If a fiscal policy
action is largely offset by direct private sector responses,
it fails to stimulate total economic activity. In this case,
the private sector is said to have been "crowded out" by the
government action.
Three different explanations for crowding out phenomena
are distinguished by Blinder and Solow (1973) . First, crowding
out occurs as the LM curve moves back toward the origin after
an expansionary fiscal policy. As shown in Figure 4, the IS
curve shifts up to IS1 from ISo with an expansionary fiscal
policy; At.the initial price level PO' demand for output rises
to Y1. This is shown as a shift in the demand curve to D1 in
the goods market, generating an excess demand gap of Y1 - Yo
which forces price to rise. However the price increase is
fully anticipated by agents and output stays at the natural
rate, Yo. In the financial market, the price increase reduces
the real level of money stock (Ms/P) and, hence, moves the LM
curve up to LMl. This raises interest rates further to r2 and
reduces investment and consumption, which result in a decline
in income to the original level. Overall, the expansionary
fiscal policy actions are offset or crowded out. The policy
affects.nominal variables but not real variables, thus leaving
the equilibrium of the economy unaffected. The general price
level and interest rates are increased by the same proportion.
But real income and real interest rates remain at the original
14
I I
'0 '1
Goods and Money Markets
L:
I l
l /l
Labor Market
g I
P3 \‘\\ '
\\
_ I ‘IDI
R
\r‘ p.
I
YO Y1
Goods Market
Figure 4. Fiscal Policy in the New Classical Paradigm
15
level. By the same reasoning, tight fiscal policy has no
effect on real variables either.
Second, crowding out occurs as the IS curve moves back
toward the origin. As shown in Figure 4, the shift in the IS
curve from ISo to 181 with an expansionary fiscal policy
raises the interest rate. Private investment will be decreased
until there is no more upward pressure on the interest rate.
The stimulative effect of the expansionary fiscal action is
exactly offset by the decreased investment and the IS curve
moves back to the original level, ISO.
Finally, crowding out occurs as government policy actions
are largely offset by direct private sector responses before
they can affect the economy. Tatom (1985) believed that this
type of crowding out can occur regardless of the methods of
financing the government expenditure. A debt financed
government expenditure induces an offsetting change in private
investment, and a tax financed expenditure has a displacement
effect on private consumption. Therefore, fiscal policy
doesn't change the path of the economy. Aggregate demand
(income), interest rate, and the price level are not affected
by the fiscal action (p.10, Tatom, 1985).
The permanent income hypothesis defines consumption
expenditures to be a function of permanent income, which is
a constant fraction of current assets and expected total
future earnings discounted back to the current time (Friedman,
1957). Under the permanent income hypothesis, variations in
16
personal saving' have a large cyclical component. due to
transitory income changes which don't have any effect on an
agent's consumption.plan. The permanent income hypothesis can
also be applied to the government budget constraint, which
indicates that the jpresent value of current and future
government expenditures must equal the present value of taxes.
Debt financed government expenditure must be paid, if not at
present, then sometime in the future. Households perceive and
discount the increased government borrowing as a future tax
liability. Any transitory increase in income caused by a tax
cut will be saved to pay future taxes. Thus, any change in the
tax scheme or the government debt is offset by an equal change
in private saving, leaving agents' consumption plans
unchanged. The shifts between taxation and government
borrowing affect the timing of the tax collection and the
components of personal income, but not aggregate wealth. The
method of financing government expenditure is irrelevant to
the real economy in the case of lump sum taxes. This
hypothesis, known as the Ricardian proposition, is concerned
with the ineffectiveness of shifts between taxes and
government borrowing. (Ricardo, 1951; Crouch, 1972; Barro,
1974, 1978a; Boothe and Reid, 1989).
However, there is also another explanation for the effect
of financing government expenditure on the economy: debt
financed government expenditure doesn't affect the real
economy but causes a monetary expansion. This hypothesis is
17
sometimes called "the monetarist paradigm" because of the
emphasis on monetary factors. In a monetarist framework, there
is a tendency for the Federal Reserve to control interest.rate
movements by conducting monetary policy. When government
deficits place upward pressure on interest rates, the Federal
Reserve tries to reduce the effect of the deficit on interest
rates by printing money. The monetary expansion will cause
inflation but not affect the real economy, by the same
arguments discussed in the case of fiscal expansion. The
monetarist paradigm implies that the shifts between the
monetization and nonmonetization of government deficit do not
affect the real economy, but cause a monetary expansion.
(Hamburger and Zwick, 1981; Fusfeld, 1982; Protopapadakis and
Siegel, 1984).
Although the Ricardian hypothesis is only concerned with
the financing decision of the government, some scholars have
related it to the size of the government budget. For example,
Feldstein (1982) argued that the Ricardian equivalence theorem
implies irrelevance of not only the method of financing, but
also the size of government expenditures.
In contrast to the Keynesian paradigm, the classical
paradigm is based on a market clearing (or equilibrium)
assumption with price and wage flexibility. Neither the size
of the budget nor the method of financing government
expenditures affect the real economy.
18
3. Fiscal Policies in the Nee-Keynesian Paradigm
Andrews and Rausser (1986) described the evolution of the
Neo-Keynesian paradigm as follows;
Traditional Keynesians in a quandary to develop a
rival to the natural rate hypothesis, turned to the
fixed-flex price model first proposed by Means and
expanded it to explain how stagflation can be
generated from exogenous supply shocks. These
modifications of the traditional Keynesian sticky
price model have converged into a competing
paradigm known as the Neo-Keynesian school. (p.414)
The main characteristic of the Neo-Keynesian paradigm is the
heterogeneity in the economy. It contains both Walrasian
auction markets (flexible price sector) and nonclearing
customer markets (fixed price sector). Although the reasons
for sticky' prices in. the short run are not completely
understood, some justifications have been proposed based on
the optimizing behavior of agents. Search costs (information
costs) due to imperfect information (Okun, 1975); transaction
costs (management costs) due to price setting and delivery
lags (Blinder, 1982; Carlton, 1978, 1979, 1980); implicit wage
contracts due to the uncertain environment (Taylor, 1979,
1980); anduasymmetric information (Stiglitz, 1984) are‘various
candidates for Neo-Keynesian microfoundations.
The Neo-Keynesian view does not deny money neutrality and
the natural rate:of employment in the long run, but emphasizes
the short run responses to a shock to the economy. Due to the
19
heterogeneity of markets, fiscal policy as well as monetary
policy leads to changes in the relative price between auction
and customer markets, even under rational expectations. The
price of the flexible sector overshoots its long run
equilibrium level while the price of the other sector change
little during the transition period. The rate of temporary
overshooting depends on the size of the auction sector and.the
speed of the adjustment. Real output, employment, and.the rate
of interest will also be affected by the differential price
movement. After the adjustment period, the price of inflexible
sector responds and the price of flexible sector moves back
to its long run equilibrium level (Chambers, 1984; Frankel,
1984; Rausser, 1985; Stamoulis, Chalfant and Rausser, 1985,
1987; Andrews and.Rausser, 1986; Rausser, Chalfant, Love, and
Stamoulis, 1986).
The impact of fiscal policy in the Neo-Keynesian paradigm
can.be contrasted to the results from other paradigms by using
a macroeconomic model. To measure the fiscal policy effect,
let
(1) M-p=¢y-6r (¢,5>0)
and
(2) y =a-Btr-(pe-p)1+uc (B.u>0)
be the equations for LM and IS curves respectively, where M
is the log of the nominal money supply, p is the log of the
20
overall price level, y is the log of total output, r is the
short term nominal interest rate, pe is the log of the
expected price, and G is the fiscal policy action.
Expectations are formed based on the long run equilibrium
paths of economy.
Both monetary and fiscal actions are governed by feed
back rules
(3) G = f(fl) + CG
and
(4) M = 9(9) + 5M:
where n is an information set available at the previous time
period and 6G and EM represent the random part of G and M,
respectively.
There are two different goods in the model, flexible
price goods with the price pf in log form, and fixed price
goods with the price pn in log form. The flexible price goods
are homogenous and storable. Their expected earnings from
speculative storage are assumed to be equal to storage costs
5 plus the interest cost r;
(5) pg-pf=s+rl
and the overall price level is an average of fixed sector
price with weight 1 and flexible sector price with weight
21
1-1;
(6) p = rpn + <1-r>pf.
Substituting equation (2) into equation (1) yields
(7) H ' p = ¢a - ¢B[r - (pe - p)] + ¢uG - 6r.
By substituting in equations (5) and (6) and rearranging,
equation (7) becomes
(8) M - (1-¢B)[Tpn + <1-r)pf1
= ¢a + ¢epe + ¢uc - (¢B+6)
——e
dGe dGe 1-r+1¢8+6 dG
I
assuming both prices go back to their long run equilibrium
path after the short period of adjustment (dp‘E/dGe = dpfi/dGe
= dpe/dGe). Therefore, flexible sector prices overshoot their
long run equilibrium path during the adjustment period.
Equation (13) shows that if one price does not deviate from
its long run equilibrium path, then the other price would keep
its long run equilibrium path as well. In this case, fiscal
policy should be neutral to all sectors of the economy. The
more flexible sectors (the smaller is r) the economy has, the
less overshooting occurs. With 1 = 0, no overshooting occurs
and the prices are always in equilibrium(the Neoclassical
economy). The more fixed sectors (the bigger is r) the economy
has, the more overshooting occurs and.the longer it lasts. The
effect of an expected government policy shock on any
particular sector will depend on the flexibility of the
economy (the value of r) and will be left as an empirical
question. Rausser (1985) views the agricultural sector as
flexible, and Just and Chambers (1987) view it as fixed.
24
4. Empirical Tests of the Effects of Fiscal Policy
The contrast between different schools of thought in
explaining the effects of fiscal policy on the economy can be
addressed by looking at the experience during the 19705 and
19805. From 1981 to 1986, the U.S. inflation rate declined by
22.1% per year while the rate of interest remained very high.
The U.S. exchange rate rose consistently by an average of
10.6% per year between 1980 and 1985 (see Figure 5). U.S.
federal budget deficits grew over 28.3% per year on average
between 1979 and 1986 (see Figure 1). If we look only at
annual statistics for those years, the association between
deficits and macroeconomic variables appears to strongly
support the Keynesian model.
Yet, when the 19605 and the 19705 are examined, a
different picture emerges. Between 1969 and 1972, U.S. federal
deficits increased continuously, from a $3.2 billion surplus
to $23.4 billion deficit. During that time, U.S. exchange
rates and interest rates fell consistently. The interest rate
also remained quite low averaging 5.39% per year. The
inflation rate remained stable over the period except for a
short fall in 1972. Moreover, no particular pattern is found
in the relationship between the federal deficit and other
macroeconomic variables between 1972 and 1979. Thus, it is
difficult to draw conclusions based on the annual statistics.
Such a narrow focus necessarily raises questions about the
25
20
181-
18*)-
14*
’\ / \
12pr
10+
L L l l A L l L
7*1— I r '71
1975
1970
Interest Rate (3 Month T-Bill Rate)
__ __ Exchange Rate (Multilateral Trade Weighted Value
of the U.S. Dollars, 1973:10)
_ _ Inflation Rate (Percentage Change from Preceding
GNP Implicit Price Deflator)
Figure 5. Interest Rate, Exchange Rate, and Inflation rate
26
generality of the presumed relationships.
Numerous scholars have tried to test empirically the
different propositions. Gramlich (1971) and Framm and Klein
(1973), in support of the Keynesian view, found a significant
impact of government expenditure increases on real income. On
the other hand, Keran (1969) and Batten and Thoronton (1984)
supported the classical view of crowding out and found no
impact of government spending changes on real income. Carlson
(1982) supported the Ricardian hypothesis and found neither
government expenditures nor deficits affect income, even in
nominal terms
Similar controversies were found in the relationship
between the federal budget deficit and financial variables
(interest rates, the exchange rate, and inflation). Feldstein
and Eckstein (1970), Makin (1983), and Cohen and Clark (1984)
supported the Keynesian view that the budget deficit has a
positive impact on real interest rates. Frankel (1984), in
support of Neo-Keynesian view, found a positive impact in the
short run. However, Belongia and Stone (1985) didn't find any
relationship between real interest rates and the federal
deficit, supporting the classical view. Canto and Rapp (1982)
didn't find any relationship even with the nominal interest
rate. Carlson (1982) and Evans (1986, 1987) supported the
Ricardian hypothesis and found neither government expenditures
nor budget deficits cause changes in interest rates, either
in nominal or' real terms. Plosser (1982) supported the
27
Ricardian view but rejected ex-ante crowding out. He found
that federal budget deficits have no impact on nominal
interest rates, but that a balanced budget increase has
impacts on interests rate in both nominal and real terms.
In the case of exchange rates and the deficit, Hutchinson
and Throop (1985) found a positive relationship and Cohen and
Clark (1984) found a negative relationship. However, Belongia
and Stone (1985) and Batten and Belongia (1986) didn't find
any relationship.
In the case of inflation (or money supply) and the
deficit, Rausser (1985) estimated a temporary price decrease
in the flexible good sector caused by a non-monetized deficit.
Niskanen (1978), Dornbush and Fisher (1981), McMillin and
Beard (1982), and Protopapadakis and Siegel (1984) all
supported the Ricardian equivalence theorem. The government
deficit appeared not to have any impact on inflation (or money
supply) in their estimation. Barro (1977, 1978a, 1978b) also
supports the Ricardian proposition that the budget deficit has
no impact on the real economy, but found that government
expenditure increases stimulate money growth and inflation.
Barr (1979) supported the monetarist view by finding a
positive relationship between the general price level and
budget deficits. Hamburger and Zwick (1981) also found that
both government expenditure and the deficit are responsible
for monetary expansion. Hamburger and Zwick (1982) and Allen
and Smith (1983) supported the monetarist hypothesis by
28
finding an impact of the budget deficit on money supply, but
didn't find any causality from government spending to the
money supply.
The conflicting empirical evidence makes the issue of
fiscal policy impacts on macroeconomic variables an unresolved
puzzle. This tends to place macroeconomics in a state of
disarray (Grossman, 1980; Fusfeld, 1982; Barro, 1984). Bell
and Kristol (1981) refer to this disarray as a "crisis in
economic theory". Not surprisingly, these different
macroeconomic theories have resulted in an wide disagreement
in studies on how macroeconomic policies affect agriculture.
5. Fiscal Policies and Agriculture
Traditionally, agricultural economists.have.devoted most
of their attention to microeconomic issues because the
classical economic paradigm applies to agricultural markets
better than anywhere else (Frankel, 1984). However, attention
has gradually turned to macroeconomic issues after Schuh
( 1974) argued for the important role of a macroeconomic
variable, the exchange rate, in economic fluctuations in
agriculture. Most of the attention so far has focused on
monetary policy impacts on agriculture through macroeconomic
variables, such as the inflation rate, interest.rates, and.the
exchange rate (Shei and Thompson, 1981; Chambers and Just,
1981; Rausser, 1985; Orden, 1986).
29
Schuh (1981) turned his attention to another dimension
of macroeconomic policy, namely fiscal policy. Schuh (1983)
in his testimony to the U.S. Congress argued that the federal
budget deficit, as well as the tight monetary policy, causes
unfavorable conditions for the farm economy. The government
deficit, in his view, tends to increase real interest rates
and hence the exchange rate. Decreases in agricultural
exports, prices, and incomes follow because agriculture is an
export oriented sector. Schuh (1984a) later emphasized this
view by stating that "a more nearly balanced federal budget
probably would do as much as anything to improve our
agricultural export performance" (p.246).
Schuh's initial work was nothing more than an extension
of the Keynesian paradigm to the farm economy and it received
immediate response from a number of researchers. Belongia and
Stone (1985) and Batten and Belongia (1986) criticized the
Keynesian view of fiscal policy impacts on agriculture. Though
a negative relationship between the real exchange rate and
agricultural exports was found in their empirical analysis,
neither money nor the federal deficit caused changes in real
interest rates and exchange rates. They concluded that
"attributions of the decline in farm exports to monetary
policy or the deficit are difficult to support empirically and
still may be regarded, at this late date, only as conjecture"
(p.427, Batten and Belongia).
Barclay and Tweeten (1988) supported Schuh's conjecture
30
by finding a negative impact of federal deficit increases on
agricultural exports and prices. An increase in interest rates
and an appreciation of the U.S. dollar caused by an increase
in the federal deficit is found to be a major mechanism for
the impact.
Rausser (1985) looked at the issue differently. He found
that the speed of price adjustment to any shock in the
monetary variables (money supply, interest rate, and exchange
rate) is much faster in the case of agricultural goods
compared to industrial goods. Chambers (1985) and Bredahl
(1985) related the differential price adjustment to the
stylized facts that‘U.S. agriculture has; (a) highly inelastic
demand and supply, (b) low income elasticities of demand, (c)
high competition, (d) rapid technological change, (e) asset
fixity, (f) variability in supply due to weather, and (g)
foreign agricultural. policy. Rausser found that
nonmonetization of the federal deficit has the same effect on
the economy as tight monetary policy does. It depresses farm
prices through its deflationary impact on the general price
level. Rausser, Chalfant, Love, and Stamoulis (1986) also
supported the short run responses of agricultural prices due
to fiscal deficit changes. However, the neutrality of the
economy is supported in the long run. They argued that
agricultural prices follow a new long run equilibrium path
after a short adjustment period. Thus, the relative price of
agricultural goods to industrial goods remains stable in the
31
long run.
Recently, Just and Chambers (1987) developed a
theoretical model to explain the relationship between the farm
economy and budget deficits. They compared the performance of
three alternative ways to reduce the current budget deficit:
expenditure reduction, monetary expansion, and a tax increase.
Their model appears to be the first theoretical model dealing
directly with fiscal policy impacts on agriculture. Again,
the differential price adjustment scheme is used in their
model, but the direction is just the opposite to Rausser and
others. Farm prices are believed to be fixed due to government
intervention, and industrial prices are allowed to be
flexible. Therefore, any inflationary policy causes a "cost-
price squeeze" in agriculture by increasing industrial prices
relative to farm prices. Expansionary fiscal policy hurts the
farm economy as much as expansionary monetary policy, where
financing the expenditure by borrowing (or a tax) stimulates
it. The results are derived from a comparative static analysis
with a multi-period equilibrium condition in the government
budget. However, the model has many weaknesses, and so far it
lacks empirical support to validate its results.
Thus far, the current literature dealing with fiscal
policy impacts on agriculture have been discussed. The
empirical model by Rausser (1985) and the theoretical model
by Just and Chambers (1987) have been described as Neo-
Keynesian models. The empirical works by Belongia and Stone
32
(1985) and Batten and Belongia (1986) fit the classical
paradigm. Papers by Schuh (1981, 1983) and Barclay and Tweeten
(1988) fit the Keynesian paradigm.
To reduce the current huge federal deficit, Just and
Chambers argued that a government expenditure reduction would
have the most beneficial effects for agriculture. Belongia and
others argued that focusing attention on deficit reduction
measures diverts attention from more fundamental changes
required in farm commodity programs since budget deficits do
not have impacts on agriculture. However, Rausser and others
argued for the dominance of macroeconomic policies over farm
policies in affecting the farm economy in the short run. They
confined the role of farm policies to reducing instability of
farm prices and not providing incentives for over-allocation
of resources to agricultural production. Frequent use of farm
policy would hurt the farm economy by causing more
overshooting to macroeconomic policy shocks later. Barclay and
Tweeten defined optimal policy as a balanced budget and
international account with zero differential between domestic
and foreign interest rates. No jparticular solutions for
reducing the current budget deficit are described in their
simulation study.
CHAPTER III
MODELS AND RESEARCH METHODS
As discussed in the previous section, wide disagreement
exists regarding the effects of fiscal policy on agriculture.
Three different approaches to empirical macroeconomic modeling
can be distinguished: the simultaneous equations model (SEM);
the rational expectation model (REM); and the vector
autoregression model (VAR). In this section, comparisons of
these models will be made and the selection of the VAR
approach for this analysis will be justified. Some recent
developments in time series analysis also will be discussed
and taken into account to establish an improved VAR procedure.
The methods applied in this paper will be introduced at the
end of the section.
1. Models Used in Empirical Macroeconomics
1.1. The Traditional Simultaneous Equations Model
The SEM often has been referred as "Keynesian
macroeconometrics" because it is widely used in the empirical
macroeconomic analysis of Keynesian Models (Cooley and Leroy,
1985). The SEM tends to be large scale, taking account of many
behavioral relations between macroeconomic variables.
A system of g stochastically dependent equations can be
33
34
represented generally as
(15) A(L)yt = B(L)et.
where yt is a (gxl) vector of g macroeconomic variables at
time t and et is a (gxl) vector of disturbance terms. It is
assumed that E(et)=0 and E(ete;)=n for t=s, and O for t#s.
n is a diagonal matrix, implying no contemporaneous
correlation among the error terms across the equations.
Assuming B(L)=I for simplicity gives
(15) A(L)yt = et
p .
with A(L) = E Aij where the Ajs are (gxg) matrices of
i=0
autoregressive parameters and L is the lag operator. The model
is assumed to be stable and all the roots of the
characteristic equation |A(L)|=0 lie outside the unit circle.
The SEM usually distinguishes exogenous and endogenous
variables based on economic theory; By redefining A(L) and.yt,
the structural form of SEM is represented as
(17) [ A11(L’ A12(L) ][ wt ] = [ elt ]
° A22(L) xt e2t '
where A11(L) is a [(g-k)x(g-k)] matrix, A12(L) is a [(g-k)xk]
matrix, and A22(L) is a (kxk) matrix of A(L) elements. The O
35
is an [kx(g-k)] matrix of zeros. wt is a [(g-k)x1] vector of
observations on the endogenous elements of yt and xt is a
(kxl) vector of observations on the exogenous part of the yt
variables. e1t is a [(g-k)x1] vector of disturbance terms for
the wt equations and e2t is a (kxl) vector of disturbance
terms for the xt equations. A11(L), A12(L), and A22(L) are
assumed to have the orders p, q, and r, respectively, which
are not necessarily the same.
The corresponding reduced form is
_ —1 -1
Numerous a priori restrictions are used to identify the
parameters of the behavioral equations. Zero or equality
restrictions are.often.applied.to)A11(L) and A12(L) to exclude
variables from a specific equation. Restrictions on the lag
structure and the error structure are also used. The
predictive power of the model depends on the credibility of
the restrictions.
The problems associated with the SEMs are now well known.
The traditional model uses many restrictions which often cause
over-identification. Some restrictions are based on
controversial aspects of economic theory’ and. not 'tested
empirically. The SEM has a weakness for policy analysis
because its structure may not be invariant to policy changes.
The parameters of the behavioral equations usually do not
36
account for any policy caused structural changes. Such a
change is likely to occur since any change in policy affects
the agent's decision rules by changing their views of the
future. Finally, the errors across the equations are likely
to be related since they are produced by the same decision
making process.
1.2. The Rational Expectations Model
The REM considers the agent's views on. the future
seriously since these views affect the optimizing behavior of
economic agents. With inclusion of the expected values of
endogenous variables, the structural form of REM is
represented as
(19) A11(L)wt + ¢w§ + A12(L)xt = e1t
A22(let = eZt'
where ¢ is an (gxg) matrix of parameters and. w: is
expectation of wt formed in period t-1; that is, w: = E[wt|
wT, x rseonossodun.osm om ro=nono11odon1osm om «Isms oimmoxosnoa mos.om
moonm
< z t m a x a a a
«H .um_ .uNs .mmm .owo .Num .uNN .NNm -.ooN .Noo
1N .NuN .Nuu .mum -.oow -.Nmo .NaN .ouu .omo .05.
«N .oNA -.HNN .mNm .ONm .oNu .NNo -.oom -.omN -.ooN
1. -.oom -.ONN .uoo -.o—o .ooN .Hu— -.NNN -.on -.NNN
1m -.Noo ._.o ...N -.NNN .oNN .NNN -.Nu— -.NmN -.NNN
1m -.owm .NoN .me -.omo -.omm .osm -.omm -.oSN -.Nom
«N -.on -.ouo .uNo .omo -.uNo .oma -.om— -.ooo -.~_w
1m -.omm -.oNN .uma -.ONu -.oom -.omu -.omc -.Nuo -.Nom
so -.oom .ouo .um_ -._~m .Nuo -.omu .ouN .o—_ .oo.
«No . -.oom .Noo .uwm .omN -.oau -.omm .NNN .oN_ .Nom
sNH -.ooo .NNw .Num -.ON_ -.Nsm -.NNN -.Nuo .oom -.cmm
1~N -.NoN .NNu .uam -._.~ -.osm -.NNN -.omm -.oou -.ouo
«Na -.coN -.on .wa .oNo .ONo -.Nmm -.Nom -.__o -.ooo
1N. -.NNm .ONN .Nou .NNN .omm -.os~ -.uou -.ou— -.oms
1pm -.omu .oau .Nuo -.Nus -.ous -.Nos .o—m -.co— -.ow—
sum .ouu .oso .Nsw -.OON -.~N~ -.Nuo -.oo— .omo .omo
sNN .oNo -.osm .uN_ .ONN .o—o -.Num -.ooN .oms .ONN
sum .omN -.oms .Nos -.ouo .Nun -.NNN .omN .ONu .LNS
sue .oNo -.NNN .NmN -.owN -.oao -.Noc .omo .ouN .oNu
«No .ONN -.omm .NNm .oNo -.ouw -.co— .cmw .oua .-m
78
Table 9. Lag Selection for AM, AR, AY, AP, AX, and AF
Lag Criteria 2 1 Sig.
Length x (36) Level
p-1 (Xioggf AIC sc
0 .7830 -46.3ov —46.30v
1 .8421 -45.86 -45.86 570.72 .0000***
2 .5697 -45.89 -44.53 72.76 .0000***
3 .4485 -45.76 -43.73 46.24 .1179
4 .3500 -45.65 -42.94 47.45 .0960*
5 .2115 -45.79 -42.40 55.36 .0206**
6 .1471 -45.79 -41.72 51.44 .0459**
7 .0974 -45.84 -41.09 56.64 .0156**
8 .0646 -45.88 -40.46 46.20 .1188
9 .0476 -45.83 -39.73 41.80 .2333
10 .0253 -46.09 -39.31 62.26 .0042***
11 .0165v -46.16 -38.70 47.63 .0930*
1.Likelihood ratio statistics to test Ho: Lag length of p-2
vs. Ha: Lag length of p-l.
2.H9 is rejected at 10% level for *, at 5% for ** and at 1%
or 4*4,
3.v indicates minimum value for each information criteria.
79
Table 10. JJ Test Results for M, R, Y, P, X, and F
H0
-21nQ
4
5
2
1
Two lags
124.10***
76.73***
52.52***
30.04***
11.91
1.48
Seven lags
154.52**
100.93**
58.64**
22.81
5.95
.43
*
*
*
***: Reject the null hypothesis at .01 level.
80
vectors are also found with five or more lags and four
cointegrating vectors with other lags. Thus, at least three
long run equilibrium relationships are evident among the six
nonstationary variables.
Although a cointegrating vector may describe an
equilibrium among all variables in a system, it is also
plausible that only a subset of the variables are significant
in the cointegration. In this case, the dimension of the
cointegrating vector must be reduced. The bigger the system
is, the more possibilty of reduction in the dimension of
cointegrating vector. To simplify the cointegrating vector,
the Johanson and Juselius test is applied to all possible
combinations of two variables among the six nonstationary
variables. However, no cointegration is found in any two
variable combination. This results in moving to a test on
three variable combinations.
Among the various possible three variable combinations,
Hoffman and.Rasche (1989a, 1989b) have shown that the long run
money demand function, a linear combination of M, Y and R, is
a strong candidate.
4 . Money Market Equilibrium
The long run money demand function, known as the LM curve
or portfolio balance schedule, has received much attention
from macroeconomists (Meltzer, 1963; Chow, 1966; Poole, 1970,
81
1988; Goldfeld, 1973). The portfolio balance schedule is
represented as
(51) aMMt + aYYt + aRRt = eMt’
The Johansen and Juselius method is applied to test the
existence of a long run equilibrimm relationship among the
three variables. Two, four or seven lags are adopted for the
cointegration test equations based on lag selection criteria
reported in Table 11. The test statistics for cointegration
are given in Table 12. The estimated eigenvalues and
eigenvectors are presented in Table 13 with parameter
matrices. One cointegration is found at the .05 significance
level and the long run money demand equation is established
as equation (51). The coefficients, “M' any, and “R are
obtained from.the first column in a vector in Table 13 and are
significant by the Wald test. The LM equation is more familiar
after normalization as
N
N
(52) Mt = aYYt + “RRt'
Estimated values for cg, ranging from -.71 to -1.29, suggest
that the equilibrium real income elasticity of money demand
with respect to real balances is unity as many macroeconomists
conjecture. To test.HO: “MI: -aY or 0%.: 1, a likelihood ratio
test statistic, equation (46), and.‘Wald. test statistic,
82
Table 11. Lag Selection for AM, AY, and AR
Lag Criteria 2 1 Sig.
Length x (9) Level
838 AIC sc
(x10 )
0 .1129 -22.90 —22.90v
***
1 .1171 -22.79 -22.62 28542.00 .0000
2 .0912 -22.97 -22.63 43.46 .0000***
3 .0854 -22.96 -22.45 16.21 .0626*
4 .0783 -22.98 -22.30 19.98 .0180**
5 .0736 -22.97 -22.12 14.29 .1125
6 .0675 -23.98v -21.96 7.29 .6074*
7 .0603 -23.02 -21.83 17.67 .0392**
8 .0556 -23.03 -21.67 6.39 .7002
9 .0554 -22.96 -21.43 6.36 .7035
10 .0503 -22.98 -21.28 14.44 .1074
11 .0469v -22.98 -21.11 13.51 .1409
1.Likelihood ratio statistics to test Ho: Lag length of p-1
vs. Ha: Lag length of p.
2.H is rejected at 10% level for *, at 5% for ** and at 1%
or ***,
3.v indicates minimum value for each information criteria.
83
Table 12. JJ Test Results for M, Y, and R
h m Two lags Four lags Seven lags
o 3 29.85*** 32.58*** 28.35**
1 2 6.55 9.52 12.50*
2 1 1.44 2.68 2.55
Reject the null hypothesis at .01 level for ***, at .05 level
for **, and at .10 level for *.
84
Table 13. Eigenvalues and Eigenvectors for M, Y, and R
Two lags
Eigenvalues A
.13 .03 .01
Eigenvectors V (=a)
M 14.15 -10.87 9.51
Y -10.10 4.58 2.37
R 5.38 -.75 -.94
-sopv x 1000 (=n)
M 1.64 -1.18 .16
Y 3.10 .72 .21
R 21.99 1.67 -9.91
Four lags
Eigenvalues A
.13 .04 .02
Eigenvectors V (=a)
M 14.01 13.83 11.01
Y -1l.54 -5.30 1.65
R 6.23 1.15 -.28
"SOpV x 1000 (=n)
M .94 1.35 .50
Y 2.37 -.78 .69
R 37.59 .49 -7.44
Seven lags
Eigenvalues A
.10 .06 .02
Eigenvectors V (=a)
M 9.00 24.77 6.43
Y -11.59 -9.23 4.11
R 6.79 3.74 -.84
-sopv x 1000 (=n)
M -.83 1.76 .02
Y 1.55 .63 .77
R 30.01 9.41 -6.13
85
equation (48), are used. Results are provided in.Table 14 with
corresponding eigenvalues and eigenvectors. Both tests failed
to reject the unitary income elasticity hypothesis. The long
run LM equation (52) with the restriction is reestimated as
*
with a; having values -.55 for two and four lags and -.58 for
seven lags.
The results are quite consistent with Hoffman and Rasche
(1989a) who found the interest rate elasticity is -.53 for
four lags and -.56 for seven lags with monthly data from 1953
to 1987. However, Stock and Watson (1989) didn't find
cointegration between these monetary variables. The results
are not sensitive to other lag specifications. One
cointegration with the unitary income elasticity is also
accepted with three lags, five, six and eight lags. Estimates
of the interest rate elasticity in the restricted money demand
equation.were -.56 for three, six and eight lags and -.58 for
five lags.
Based on the cointegration results, three variables in
the LM equation can be merged into a synthetic time series
ZMt = Mt - Yt - aERt, which represents deviations from the
long run money market equilibrium. In Figure 7, the actual
balance and the equilibrium balance of money are plotted with
a; = -.55. th is represented by the vertical differences
86
Table 14. Test Results for the Velocity Restriction
Two lags
Eigenvalues 1* .12 .03
Eigenvectors V (M & Y) 9.51 5.42
( R ) 5.28 1.24
Test for the Velocity Restriction: x2(1) 1.81
N 1.52
Implied Interest Elasticity of Velocity -.55
(.03)
Four lags
Eigenvalues 1* .13 .03
Eigenvectors V (M & Y) 11.03 5.53
( R ) 6.06 1.23
Test for the Velocity Restriction: x2(1) .53
N .82
Implied Interest Elasticity of Velocity —.55
(.02)
Seven lags
Eigenvalues 1* .10 .03
Eigenvectors V (M & Y) 12.58 8.03
( R ) 7.20 2.48
Test for the Velocity Restriction: x2(1) .14
N .58
Implied Interest Elasticity of Velocity
-.58
(.05)
87
5.01” -’ —-’ — .- _ -
2.5 T
2.0 4- 1‘
MONEY BALANCE
1.03”
.ST
v-._.—-
01
48:3 58:3 68:3 78:3 88:3
__ Actual
__ __ Equilibrium
Figure 7. Actual and Equilibrium Real Money Balances
88
between them. Any changes in M, Y and R will be directly
reflected in ZM'
5. Exchange Rate Equilibrium
Unlike the long run money demand function, equilibrium
among P, F and X, has not been studied yet. The rationale for
the long run equilibrium relationship can be derived from the
PPP (Purchasing Power Parity) equation which can be written
as
(54) Xt = a0 + a1(Qt-Q;) + ut.
Qt' and 0; denote, respectively, the domestic and foreign
aggregate price indices. To maintain the terms of trade the
constant, 01 must be unity.
Because PPP tends to be rejected empirically when applied
to aggregate price indices (Frenkel, 1981; Branson, 1981;
Batten Belongia, 1984) , many scholars have replaced the
aggregate price indices with prices of specific commodity
groups. Protopapadakis and Stall (1983) have termed this the
LOP (Law of One Price). Frenkel (1981) disaggregated the
general price indice into prices of traded goods and non-
traded goods, and Isard (1977) disaggregated into
manufacturing goods and primary goods.
In its strictest form, the LOP implies ao=0 and al=1 in
89
(54) where Qt denotes disaggregated prices. The result can be
obtained with competitive behavior in the market;
instantaneous adjustment of prices and the exchange rate; a
high degree of homogeneity between products; and no trade
barriers and transportation costs. Though it is difficult to
find a commodity to fit all of these conditions, Isard (1977),
Protopapadakis and Stall (1983), Jabara and Schwartz (1987),
and Ardeni (1989) considered agricultural goods as the best
possible candidate. Empirical tests of the LOP for
agricultural goods have produced mixed results, depending on
the.commodity, time periods and countrie5‘used.in‘thelanalysis
(Jabara and Schwartz, 1987; Ardeni, 1989).
To test the LOP in agricultural goods, the PPP equation
(54) is expressed as
The aggregate price level is assumed to be an index of
industrial prices with weight 8 and farm prices with weight
1-8 (domestic), and 8* and 1-8* (foreign):
(56) Q = 8P + (l-B)F
and
(57) 0* = 6*P* + (1-B*)F*.
90
Subtracting (57) from (56) and rearranging terms yields
(58) F - F* = (Q - 0*) + B(F - P) - B*(F* - P*).
Substituting equation (58) into equation (55) yields
* 4 * *
When the aggregate price indices in the domestic and foreign
countries have a long run equilibrium relationship (ie., F;-
P; = zit) and the relative price index between sectors abroad
remain stable in the long run (ie., Qt-Q; = 22t)' the third
and the fourth terms in right hand side of (59) can be
replaced.with stationary error processes. Thus, equation (59)
becomes
(60) Xt = a0,t + a18(Ft—Pt) + u;
or, more generally,
(61) xt = as't + aFBFt - apspt+ ué.
For the U.S. economy, the weight of farm prices in the
aggregate price index is considered to be near zero4. With
4For the last three decades, the weight of farm prices
on aggregate price index (GNP implicit price deflator)
remained less than .045.
91
B=1, equation (61) becomes
(62) axXt + aPPt - aFFt = eXt'
where ax=1, aP=aF=al, and eXt=°0,t=ut‘ Therefore, the LOP
holds if ap=aF=ax=1.
The Johansen and Juselius method is applied to test the
existence of a long run equilibrium relationship among the
three variables. A dummy variable is introduced into the test
equation to take account of differences in the volatility of
the exchange rate before and after the 1973 exchange rate
system change. Two lags are adopted for the cointegration test
based on lag selection criteria reported in.Table 15. The test
statistics for cointegration are given in Table 16. The
estimated eigenvalues and eigenvectors are presented in Table
17 with parameter matrices. One cointegration is found at the
.05 level and. the long’ run equilibrium :relationship is
established as equation (62).
The coefficients, ax, up, and “F are obtained from the
first column in a vector in Table 17 and found significant by
the Wald test. To test the LOP hypothesis, Ho: ox = up = aF,
the likelihood ratio and Wald tests are used. The test
results, provided in Table 18, fail to reject the equality
restriction. Thus, the long run equilibrium equation (62) is
written as
92
Table 15. Lag Selection for AX, AP, and AF
Lag Criteria 2 1 Sig.
Length x (9) Level
p FP AIC 50
(x10 )
o .1283 -22.78 —22.77v
1 .1331 -22.67 ~22.50 56.91 .ooo***
2 .1202 -22.70 -22.36 23.54 .005***
3 .1167 -22.65 —22.14 9.75 .371
4 .1101 -22.64 ~21.96 15.58 .076*
5 .0879 -22.79 ~21.94 13.42 .144
6 .0840 -22.76 -21.74 12.42 .191
7 .0860 -22.67 -21.47 4.15 .901
8 .0645 -22.88 -21.52 26.90 .001***
9 .0615 -22.85 -21.32 11.46 .246
10 .0512 -22.97 -21.26 17.43 .042**
11 .0452V -23.02v -21.14 19.60 .021**
1.Likelihood ratio statistics to test HO: Lag length of p-1
vs. H : Lag length of p.
2.H is rejected at 10% level for *, at 5% for ** and at 1%
or ***.
3.v indicates minimum value for each information criteria.
93
Table 16. JJ Test Results for X, P, and F
HO -2an
h m Two lags Four lags Eight lags
o 3 34.71*** 42.52*** 28.63**
**
1 2 10.34 15.10 10.80
2 1 .03 .52 .28
Reject the null hypothesis at .01 level for ***, at .05 level
for **, and at .01 level for *.
94
Table 17. Eigenvalues and Eigenvectors for X, P, and F
Two lags
Eigenvalues A
.14 .06 .00
Eigenvectors V (=a)
X -5.79 -10.22 1.09
P -4.47 5.57 .90
F 5.61 -5.01 5.87
-sopv x 1000 (=n)
X -6.80 -3.84 .22
P -1.70 .39 -.05
F 3.31 -13.76 -.44
Four lags
Eigenvalues A
.16 .09 .00
Eigenvectors V (=a)
X 10.33 -8.05 .88
P 2.91 7.14 -1.00
F -4.02 -8.33 -6.41
-sopv x 1000 (=n)
X 7.24 -3.82 -.91
P 1.73 .91 .11
F 4.67 -14.74 2.13
Eight lags
Eigenvalues A
.11 .07 .00
Eigenvectors V (=a)
X 17.70 7.84 2.99
P -6.67 7.26 1.62
F 6.82 -8.26 -10.22
~50 v x 1000 (=n)
X 5.22 3.16 -.54
P -.28 1.05 .11
F 15.45 -4.72 1.35
95
Table 18. Test Results for the Exchange Rate Restriction
Two lags
Eigenvalues A* .14
Eigenvectors V 5.01
Test for the LOP Restriction: x2(1) .78
(a = a ) N .43
(a§=-a;) N .06
(aP=-aF) N .87
96
which is called the exchange rate equilibrium equation.
However, the credibility of the LOP hypothesis relies on
the stability of relative prices between sectors in other
countries and the stability of the aggregate price ratio
between countries. The results are also quite sensitive to
lag lengtht As shown in'Table 16, two cointegrations are found
with four lags at the .05 significance level and different
signs for the cointegrating vector are found with eight lags.
However, the four and eight lag models are not considered for
the cointegration test because lags from three to seven are
rejected strongly by the likelihood ratio test.
Based on the cointegrating relationship, three variables
in the exchange rate equilibrium equation can be merged into
a synthetic time series th = Ft - Pt - Xt, which represents
deviations from the long run exchange rate equilibrium. In
Figure 8, the actual and the equilibrium farm prices are
plotted. zxt, is represented. by ‘the ‘vertical differences
between them. Any changes in X, P and F will be directly
reflected in zx.
97
43' ,4 ,1“
FARM PRICES
2+
:1-
0.1
48:3 58:3 68:3 78:3
Actual
- _ _ Equilibrium
Figure 8. Actual and Equilibrium Farm Prices
138:3
CHAPTER V
A VAR MODEL OF FISCAL POLICY IMPACTS ON AGRICULTURE
1. Reduced Form Specification
As discussed in chapter III, cointegration between
variables can be used to restrict the VAR in the form of an
ECM, or to reduce number of variables in the form of ERM. The
appropriate form for an ERM will be equation (50) with three
stationary variables Dt' th, and th. Three lags were chosen
for the reduced form on the grounds of statistical tests
reported in Table 19.
Possible structural changes during the estimation period
are considered following Chambers and Just (1986) and Saunders
(1988). To test the significance of a structural change in
1973 due to the exchange rate regime change, and in 1979 due
to the Monetary Decontrol Act, the reduced form ERM is
estimated for two separate sample periods, before and after
the structural changes. Chow tests of the structural changes
are then applied. As shown in Table 20, the structural change
in 1973 has important effects on D and 2),. The structural
change in 1979 is only evident in the D equation. When the
impact of the 1973 structural change is removed by introducing
a dummy variable, the 1979 structural change is no longer
visible. Therefore, it is believed that a structural change
occurred in 1973, but not in 1979. The results are not
98
99
Table 19. Lag Selection for AD, AZ“, and AZx
Lag Criteria 2 1 Sig.
Length x (9) Level
p FP AIC sc
(x10 )
o .1941 -20.06 -20.06v
***
1 .2012 -19.95 -19.78 1856.12 .000
2 .1583 -20.12 -19.78 44.24 .ooo***
3 .1405 -2o.17 -19.66 26.37 .002***
4 .1303 -2o.17 -19.49 16.90 .050*
5 .1285 -2o.11 -19.26 8.03 .531
6 .1166 -2o.13 -19.12 17.05 .048**
7 .1125 -20.10 -18.91 10.40 .319
8 .0844 -20.31 -18.96 26.89 .001***
9 .0737 -2o.38V -18.85 15.48 .078*
10 .0738 -20.30 -l8.6l 5.41 .797
11 .0647v -20.36 -18.50 21.12 .012**
1.Likelihood ratio statistics to test Ho: Lag length of p-1
vs. Ha: Lag length of p.
2.H is rejected at 10% level for *, at 5% for ** and at 1%
or 44*,
3.v indicates minimum value for each information criteria.
100
Table 20. Test Results for Structural Change
Statistics Distribution Equation
1973 D zM zX
H51 F(S3,89) .746 .563 2.167***
cnow F(l3,135) 3.665*** .566 2.472***
1979
as1 F(29,113) .419 .501 1.888***
caow F(10,l42) 2.230** 1.402 1.287
1. Test of homoscadasticity is performed by comparing the
variances between two different sample periods.
2. The null hypothesis of homoscadasticity or no structural
change is rejected
e**,
at .05 level for ** and at .01 level for
101
sensitive to the number of lags.
The 1973 structural change is also identified in the
historical decomposition of D as shown in Table 21. The
structural change had positive impact on D implying an
increased federal budget deficit was created by the change.
No evidence of the structural changes was found in ZM and zx
using historical decomposition of these variables (Tables 22
and 23).
Though the three variable ERM has advantages over the
seven variable ECM in.model fitting and identification, it is
difficult to investigate the impact of fiscal policies on farm
and nonfarm prices using the ERM. The responses of P and F to
a shock in D will be reflected in movement of th and is not
easily identified. Replacing zXt with its component variables
turns the system into a five variable ERM and makes it
possible to detect any impact of fiscal variables on the farm
and nonfarm sectors.
With two stationary variables, D and ZM' and one
cointegrating vector among the nonstationary variables, X, P
and F, the number of unit roots contained in the system should
be no more than two. As shown in Table 24, two unit roots are
found.by the Johansen and.Juselius test. Two lags are selected
for estimation of the test equation based on likelihood ratio
tests criteria shown in Table 26. The results remained the
same with three lags through eight lags. The reduced form ERM
is estimated based on these results. The fiscal variable Dt
1172
Table 21. Historical Decoeposition of D
TIHE ACTUAL PROJECT PROJECT
ul 0973
1974:1
1974:2
1974:3
1974:4
1975:l
1975:2
1975:3
1975:4
1976:1
1976:2
l976:3
1976:4
1977:l
1977:2
1977:3
l977:4
1978:l
197B:2
1978:3
1978:4
1979:1
1979:2
1979:3
l979:4
1980:1
1980:2
1980:3
1980:4
1981:1
1981:2
(1)
0.00309
0.00726
0.00531
0.01543
0.03083
0.06402
0.03976
0.03921
0.03108
0.02759
0.03059
0.03081
0.02064
0.02133
0.02555
0.02473
0.02250
0.01134
0.01057
0.00862
0.00405
0.00242
0.00786
0.01107
0.01414
0.02414
0.02743
0.02387
0.01591
0.01630
12)
0.01328
0.01853
0.02403
ulo 0V73 D
13) (4) (5) 16)
2e Zx
0.00487 -0.01020 0.00000 0.00000
0.00230 -0.00965 -0.00112 -0.00049
0.00074 -0.01924 -0.00146 0.00197
0.02602 -0.00242 -0.00867 -0.00026 -0.00166
0.02713 -0.00472
0.02787 -0.00567
0.02847 -0.00537
0.02878 -0.00446
0.02895 -0.00330
0.02917 -0.00207 -0.00212
0.00241 -0.00032
0.00517 0.00119
0.00565 -0.00030
0.00242 -0.00062
0.00051 0.00041
0.00023 0.00031
0.00161
0.02979
0.00594
0.00863
0.00121
0.02949 -0.00088 0.00363 -0.00079 -0.00174
0.02989
0.03030
0.03071
0.03110
0.03144
0.03174
0.03199
0.03219
0.03235
0.03248
0.03259
0.03268
0.03275
0.03282
0.03288
0.03294
0.03298
0.03303
0.03306
0.00015 0.00496 -0.00257 -0.00147
0.00095 -0.00557 -0.00379 -0.00030
0.00152 -0.00202 -0.00508 '0.00228
0.00192 0.00284 -0.00669 -0.00170
0.00219 0.00287 -0.00894 -0.00065
0.00238 0.00154 -0.01109 0.00030
0.00252 -0.00576 -0.01196 -0.00292
0.00264 *0.00913 -0.01095 -0.00153
0.00275 -0.01342 -0.00999 -0.00033
0.00286 -0.01696 -0.00942 -0.00205
0.00298 -0.01874 -0.00855 -0.00287
0.00309 -0.01508 -0.00680 -0.00294
0.00319 -0.01143 -0.00521 -0.00503
0.00329 -0.00817 -0.00526 '0.00526
0.00337 0.00257 -0.00507 -0.00624
0.00345 0.00129 -0.00131 -0.00548
0.00351 -0.00128 0.00120 -0.00903
0.00356 -0.01070 -0.00066 -0.00575
0.00361 -0.01230 -0.00103 -0.00343
17)
FORECAST ERROR DUE TO
0973
0.00841
0.01623
0.02329
0.02844
0.03186
0.03354
0.03384
0.03324
0.03226
0.03124
0.03037
0.02974
0.02936
0.02919
0.02918
0.02925
0.02936
0.02947
0.02955
0.02960
0.02962
.0.02961
0.02959
0.02956
0.02953
0.02951
0.02949
0.02947
0.02946
0.02946
(8)
S.E. for
0973
0.00196 4
0.00377 4
0.00518 i
0.00586 !
0.00601 4
0.00589 9
0.00577 9
0.00574 4
0.00580 !
0.00593 4
0.00605 *
0.00615 4
0.00622 4
0.00628 4
0.00636 3
0.00644 4
0.00653 5
0.00662 4
0.00670 4
0.00679 4
0.00687 I
0.00695 4
'0.00703 5
0.00709 4
0.00715 5
0.00718 4
0.00721 4
0.00724 4
0.00726 *
0.00727 4
I :significant at
(1) is for actual values for D. (2) is for base projections and (3) for projections
set with DV73=0. Thus, the difference, 121-(31, produces (71, forecast errors of D
due to 0973. 14), (5), and (6) are forecast errors of 0 due to 0, 2e, and Zx,
respectively. The actual value 111 can be recovered by the sue of projected value
and forecast errors, that is, (3)+(4)+(5)+16l+(71. 18) is for the standard errors of
forecast error due to DV73.
.05 level.
1173
Table 22. Historical Decoeposition of Zn
(1)
121
(31
TIME ACTUAL PROJECT PROJECT
1974:l
1974:2
1974:3
1974:4
1975:1
1975:2
1975:3
1975:4
1976:1
l976:2
1976:3
1976:4
1977:1
1977:2
1977:3
l977:4
1978:1
197B:2
197B:3
197B:4
1979:1
1979:2
1979:3
1979:4
1980:1
1980:2
1980:3
19BO:4
1981:l
1981:2
-0.5659
-0.5335
-0.5435
-0.6l69
-0.7383
-0.7950
-0.7282
-0.8105
-0.9039
-0.8824
-0.8901
-O.9504
-0.9655
-0.9605
-0.9059
-0.8363
-0.8170
-0.8438
-0.7832
-0.7046
-0.6738
-0.6768
-0.6567
-0.5515
-0.4997
-0.6753
-0.6970
-0.4919
-0.5053
-0.4840
ul 0973
-0.6527
-0.6610
-0.6510
-0.6579
-0.6772
-0.6926
-0.7004
-0.7054
-0.7112
-0.7l71
-0.7220
-0.7257
-0.7290
-0.7322
-0.7353
-0.7380
-0.7405
-0.7427
-0.7447
-0.7465
-0.7480
-0.7494
-0.7505
-O.7516
-0.7524
-0.7532
-0.7539
-0.7545
-0.7550
-0.7554
u/o DV73
-0.6688
-0.6896
-0.6764
-0.6706
-0.6769
-0.6822
-0.6818
-0.6801
-0.6810
-0.6841
-0.6877
-0.6911
-0.6945
-0.6979
-0.7012
-0.7040
-0.7065
-0.7086
-0.7104
-0.7119
-0.7133
-0.7145
-0.7156
-O.7165
-0.7174
-0.7182
-0.7189
-0.7l95
-0.7201
-0.7206
(4)
15)
(6)
(7)
FORECAST ERROR DUE TO
0
0.0000
0.0090
0.0199
0.0335
0.0366
0.0230
-0.0148
-0.0290
-0.0204
-0.0100
-0.0041
-0.0074
-0.0142
-0.0080
0.0010
-0.0010
-0.0074
-0.0088
'0.0003
0.0121
0.0234
0.0339
0.0437
0.0481
0.0462
0.0414
0.0292
0.0182
0.0160
0.0252
ls
0.0868
0.1172
0.0891
0.0147
-0.0967
-0.1302
-0.0160
-0.0803
~0.1804
-0.1604
-0.1646
'0.2206
-0.2271
-0.2223
-0.1764
-0.1059
-0.0736
-0.0941
-0.0523
0.0049
0.0255
0.0130
0.0229
0.1255
0.1811
0.0133
0.0086
0.2223
0.1951
0.2014
lx
0.0000
0.0014
-0.0015
-0.0072
-0.0010
0.0049
0.0029
0.0043
0.0082
0.0052
0.0006
0.0033
0.0048
0.0020
0.0048
0.0087
0.0044
0.0019
0.0141
0.0249
0.0253
0.0258
0.0272
0.0264
0.0254
0.0233
0.0191
0.0221
0.0387
0.0449
0973
0.0161
0.0286
0.0254
0.0127
-0.0003
-0.0104
-0.0185
-0.0253
-0.0302
-0.0331
-0.0343
-0.0346
-0.0345
-0.0343
-0.0341
-0.0340
-0.0340
-0.0342
-0.0343
-0.0345
-0.0347
-0.0349
-0.0350
-0.0350
-0.0350
-0.0350
_-o.0350
-0.0350
-0.0349
-0.0349
(8)
S.E. for
0973
0.0197
0.0426
0.0563
0.0603
0.0606
0.0603
0.0598
0.0588
0.0579
0.0578
0.0582
0.0589
0.0596
0.0602
0.0606
0.0609
0.0611
0.0612
0.0613
0.0613
0.0614
0.0613
0.0613
0.0613
0.0613
0.0612
0.0612
0.0612
0.0611
0.0611
(l) is for actual values for Zn. (2) is for base projections and (3) for projections
set with 0973=0. Thus, the difference, 121-(3), produces (71, forecast errors of la
due to 0V73. 14), (5), and (6) are forecast errors of la due to 0, 2s, and Zx,
respectively. The Actual value 111 can be recovered by the sue of projected value
and forecast errors, that is, 131+(4)+(51+(6)+(71. (B) is for the standard errors of
forecast error due to 0973.
1174
Table 23. Historical Deco-position of 2x
(8)
S.E. for
0973
15) (6) (7)
FORECAST ERROR DUE TO
0973
(11 (2) 131 (4)
ACTUAL PROJECT PROJECT
w/ 0973 w/o 0973 0 ll Zx
TIHE
1974:1
1974:2
l974:3
l974:4
1975:l
1975:2
1975:3
1975:4
1976:1
1976:2
1976:3
1976:4
1977:1
1977:2
1977:3
1977:4
197B:1
l978:2
1978:3
197B:4
1979:1
1979:2
1979:3
1979:4
1980:1
l980:2
1980:3
1980:4
1981:l
1981:2
-4.0387
-4.2910
-4.2567
-4.2347
-4.3351
-4.3212
-4.2743
-4.3471
4.4419
-4.4170
-4.4179
-4.5143
-4.4549
-4.4018
-4.4140
-4.5136
-4.3388
-4.1927
-4.1786
-4.1168
-4.0598
-4.1107
'4.1206
-4.2057
-4.2979
-4.4539
-4.2440
-4.1904
-4.3345
-4.4590
-4.0827
-4.1519
-4.2164
-4.2706
-4.3163
-4.3587
-4.3985
-4.4338
-4.4640
-4.4900
-4.5125
-4.5323
-4.5495
-4.5644
-4.5774
-4.5889
-4.5990
-4.6079
-4.6158
-4.6226
-4.6286
-4.6338
-4.6384
-4.6423
-4.6457
-4.6487
-4.6513
-4.6535
-4.6554
-4.6571
-4.0906
-4.1662
-4.2365
-4.2924
-4.3347
-4.3698
-4.4010
-4.4283
-4.4518
'4.4725
-4.4916
-4.5093
-4.5256
-4.5406
-4.5541
“4.5662
-4.5771
-4.5866
-4.5950
-4.6023
-4.6086
-4.6141
-4.6189
-4.6231
-4.6268
-4.6300
-4.6328
-4.6353
-4.6374
-4.6393
0.0000
-0.0002
0.0004
0.0036
0.0078
0.0127
0.0135
0.0070
-0.0062
-0.0122
-0.0129
-0.0099
-0.0067
-0.0062
-0.0061
-0.0032
-0.0006
-0.0005
-0.0015
-0.0015
0.0014
0.0057
0.0104
0.0150
0.0184
0.0193
0.0176
0.0137
0.0070
0.0010
0.0000
-0.0142
-0.0157
-0.0190
-0.0213
-0.0168
-0.0181
-0.0276
0.0033
0.0212
0.0235
0.0462
0.0756
0.0944
0.1187
0.1372
0.1518
0.1676
0.1812
0.1767
0.1729
0.1705
0.1644
0.1497
0.1214
0.1038
0.1101
0.0739
0.0263
0.0308
0.0440
-0.1247
-0.0250
0.0513
-0.0053
0.0416
0.1288
0.1074
0.0251
0.0640
0.0841
-0.0183
0.0256
0.0743
0.0510
'0.0587
0.1090
0.2481
0.2575
0.3305
0.3945
0.3469
0.3429
0.2720
0.2080
0.0718
0.2795
0.3755
0.2877 .
0.1663
0.0080
0.0144
0.0201
0.0218
0.0184
0.0111
0.0026
-0.0054
-0.0122
-0.0174
-0.0210
-0.0230
-0.0238
-0.0238
-0.0233
-0.0227
-0.0220
-0.0213
-0.0208
-0.0203
-0.0200
-0.0197
-0.0194
-0.0192
-0.0189
-0.0187
-0.0185
-0.0182
-0.0180
-0.0178
0.0181
0.0377
0.0564
0.0712
0.0829
0.0920
0.0994
0.1057
0.1116
0.1176
0.1237
0.1299
0.1361
0.1422
0.1482
0.1538
0.1591
0.1640
0.1685
0.1725
0.1762
0.1796
0.5775
0.1854
0.1878
0.1901
0.1922
0.1941
0.1958
0.1974
(1) is for actual values for 2x. (2) is for base projections and (3) for projections
set with 0973=0. Thus, the difference, 121-(31, produces 17), forecast errors of 2x,
due to 0973. (4), (51, and (6) are forecast errors of 2x due to 0, la, and 1x,
respectively. The actual value (1) can be recovered by the sun of projected value
and forecast errors, that is, (3)+(4)+(5)+161+171. (B) is for the standard errors of
forecast error due to 0973.
105
Table 24. JJ Test Results for D, ZM' X, P, and F
Ho -21nQ
h m
o 5 117.46***
1 4 65.77***
2 3 25.93**
3 2 8.82
4 1 .10
**: Reject the null hypothesis at .05 level.
***: Reject the null hypothesis at .01 level.
106
Table 25. Eigenvalues and Eigenvectors for D, ZM' X, P,
and F
Two lags
Eigenvalues A
.27 .22 .10
Eigenvectors V (=a)
D -.60 -.56 -.00
Z .57 -.50 .52
XM -.31 -.14 .65
P -.17 .65 .55
F .43 .05 -.01
-SOPV x 1000 (=n)
D -2.79 -1.88 -1.11
2 2.51 -15.03 18.42
X” -2.39 6.59 3.48
P -1.34 1.48 .58
F 6.72 -4.45 5.30
Three largest eigenvalues and corresponding eigenvectors and
n vectors are appeared.
107
Table 26. Lag Selection for AD, AZM, AX, AP, and AF
Lag Criteria 2 1 Sig.
Length x (25) Level
FEE AIC sc
(x10 )
o .3843 -37.80 -37.80v
1 .4084 -37.49 -37.02 371.35 .ooo***
2 .2600 -37.70 -36.76 82.12 .000***
3 .2176 -37.64 -36.22 34.52 .097*
4 .1882 -37.54 -35.65 32.37 .147
5 .1180 -37.76 -35.40 49.59 .002***
6 .0990 -37.69 -34.86 32.48 .145
7 .0645 -37.88 -34.57 51.42 .001***
8 .0398 -38.12 -34.34 55.13 .000***
9 .0322 -38.08 -33.44 30.02 .223
10 .0231 -38.17 -33.44 39.68 .031**
11 .0178v -38.19v -32.99 29.64 .238
1.Likelihood ratio statistics to test H0: Lag length of p-1
vs. H : Lag length of p.
2.H is rejected at 10% level for *, at 5% for ** and at 1%
or ***.
3.v indicates minimum value for each information criteria.
108
will be replaced by its component variables, Gt and Tt in a
following section.
Table 27 provides summary statistics for the two lag
reduced form ERM. R2
s for the equations indicate a significant
proportion of the variation in dependent variables is
explained by the model. The statistics are obtained after the
model has been reparameterized to get an equivalent VAR in
levels. The ZM equation had the lowest R2
, as anticipated,
since it includes movement of three variables. The D and P
equations showed weak serial correlations based on Ljung-Box
Q statistics. The Ljung-Box Q statistics on squared error
terms, which are asymptotically equivalent to a LM test for
conditional heteroscedasticity, could not reject ARCH type
errors, except in the X series. However, it is not clear how
VAR methods, such as impulse response analysis, can be applied
with ARCH errors. No theoretical or empirical work has been
done in this area. Instead, OLS is applied and is consistent
(Engle, 1982). Overall, the summary statistics for the OLS
estimator imply that the ERM provides reasonably robust
statistical results.
2. Structural Form Identification
The reduced form is identified as the structural form if
the off-diagonal elements of the covariance matrix are zero.
However, the LM test rejected the null hypothesis of no
109
Table 27. Summary Statistics for Five Variable ERM
Stat's Dist'n Dependent Variable
D ZM X P F
R2 .884 .781 .941 .999 .983
DW 2.09 1.87 2.01 2.15 2.02
AC x2(20) 36.12** 27.71 17.90 37.03** 18.74
* * *
* 61.92** 28.38 89.02**
ARCH x2(20) 97.88** 38.30**
**: significant at .05 level.
***:significant at .01 level.
110
contemporaneous correlation at the .05 level (see Appendix E) .
Therefore, Fackler's (1988) maximum likelihood estimation
method is applied to identify the structural form.
A recursive order of D-P-X-F-ZM is considered and
estimated as shown.in.Table 28. This order allows for the most
possible influence of the federal deficit on other variables.
D is placed first in the order because the budget is set in
a long term perspective. Furthermore, fiscal policy affects
goods markets and money markets within a quarter because
agents adjust to a perceived policy changes quickly. This
order also allows effects from the goods market to the money
market within a quarter, assuming a more flexible money market
than goods market. Farm prices are ordered after industrial
prices, thus indicating farm prices are more flexible, as
Rausser (1985) has argued. ZM is ordered last in the order
because the interest rate in ZM is much more sensitive than
goods market prices. X is placed between P and ZM, since the
exchange rate equation reflects conditions of both goods and
financial markets. A recursive order of D-ZM-P-X-Fcan also
be used if the money supply in ZM is considered as a policy
variable, as discussed in the next section.
Estimates of n in Table 25 support the recursive order,
except for D and P. An order of P-D-X-F-ZM is suggested by the
speed.of adjustment parameter and this order’will be.discussed
in a following chapter.
A positive contemporaneous coefficient for D in the P,
Table 28. Estimates of Contemporaneous Parameters in
111
D-P-X-F-zM Recursive Structure
Dep. Explanatory Variables S.E.
Var.
D P X F ZM
D .0071
P .279 .0049
(.054)
X .462 .579 .0267
(.319) (.432)
F 2.687 1.591 -.247 .0598
(.718) (.971) (.176)
ZM 1.799 1.263 -.290 -.007 .0622
(.779)
(1.018) (.184) (.082)
Standard errors for the parameters
are in parenthesis.
112
X and F equations is expected because excess demand in the
goods market, caused by a federal deficit, induces
inflationary pressure. A positive coefficient for P in the F
equation is also expected because inflation in the industrial
sector induces inflationary pressure in the farm sector. The
coefficient for P in the X equation is not significant. The
negative contemporaneous coefficient of X in the F equation
is expected, as indicated by Schuh (1974, 1976). Direct
interpretations of the other parameters is difficult since ZM
consists of three different variables. The coefficient of D
in the F equation is much bigger than in the P equation,
supporting the assumption of flexible farm prices and fixed
industrial prices.
3. Dynamic Responses and Forecast Error Variance Decomposition
To detect dynamic responses of variables to the fiscal
policy shock, the reduced form ERM is reparameterized to its
equivalent VAR in levels. The response of each variable over
six year periods to a one standard deviation shock to each of
the variables are shown in Figure 9.
A positive shock to the D results in a disturbance in the
money market equilibrium as well as an increase in X. A sharp
decrease in F follows, causing a temporary cost price squeeze
in agriculture. F then increases back towards its long run
equilibrium level as P starts to decrease towards the new
1113
newcosmo om mun: ta. - (n3/4<3Dy )1/23 n1)¢1 - (1/zsn1)(S§1—s§){n(a* -1)
- 1/4(s§1-su)tn 22(yt-1-Y-1)21'1}
(Si/sn1)92 - (1/3sn1)(sn1-su)[n(a'-1)
- (n6/480y)(s§1-S§)1
(sfi/sfil)¢3 - (1/2sfil)(s§1-sfi)[n(a'-1)
- (n6 /480 y)(sn1- 83)]
= (E - a){2(yt-1-Y-1)2}1/2/§
= (a* - a){z(yt_1-Y-1)2}1’2/s*
= (a' - a) / (s'2c3>1/2
= (25*2)'1{ns§ - ns*2}
= (3s'2)‘1(nsg - ns'z)
= (zs'z)'1(nsg -n(§o - ?_1)2- ns'z)
= ztyt - ?o)yt-1/2(yt-1 - ?_1)2
-1
= (Xvi-1) 2mm
= YO - a v-1
143
144
Y = n"1 E Yt-i (i=0,1)
and §, 8* and S. are the standard errors of regression (32),
(33) and (34), respectively.
|
S0 is 8' when a = 1. Si is a consistent estimator of a
1 2
2
u = 11m
1
n' 2 B(ui) and 8:1 is a consistent estimator of a =lim n-
B(Sfi) under the appropriate null hypothesis, where 3n = 2 ut.
n :represents 'the. number' of observations. The consistent
2
estimation of 0 concerns the appropriate choice of truncation
lag parameter. Though the choice will be an empirical matter,
Perron (1986) recommended to inspection of the sample
autocorrelation of first differenced data. In this paper, the
LR in first differences is used together with the
recommendation. C. is the (i,i) element of the matrix
1
OUT)“1 and D denotes the determinant of the (Y'Y) which is
Y
represented as
_ 2 2_ 2 _ 2
Dy — (n (n 1)/12) 2yt_1 n(2tyt-1) + n(n+1) Eth-1 EYt-1
-(n(n+l)(2n+l)/6) (2yt_1)2.
The critical values for the test statistics are presented as
145
Table 36. Critical values for PP Test Statistics
Test Statistics Percentiles
10% 5% 2.5%
Z(§2) 4.03 4.68 5.31
2(63) 5.34 6.25 7.16
2(t5) -3.12 -3.41 -3.66
Z(Q1) 3.78 4.59 5.38
2(a*) -2.57 -2.86 -3.12
Z(a,) -l.62 -1.95 -2.23
Appendix c
Critical values for Schmidt-Phillips Test Statistics
Table 37. Critical Values for SP Test Statistics
n Percentiles
10% 5% 2.5% 1%
25 -2.85 -3.18 -3.50 -3.90
50 -2.80 -3.11 -3.39 -3.73
100 -2.77 -3.06 -3.32 -3.63
200 -2.76 -3.04 -3.30 -3.61
500 -2.76 -3.04 -3.29 -3.59
1000 -2.75 -3.02 -3.28 -3.58
2000 -2.75 -3.02 -3.27 -3.56
146
Table 38. Critical Values for JJ Test Statistics
Appendix D
Cointegration Test Statistics
Critical Values for Johansen-Juselius
5%
154.3
103.1
78.1
57.2
38.6
23.8
12.0
percentiles
41.2
26.1
13.9
1%
165.2
112.7
86.6
63.9
44.5
28.5
15.6
5.3
147
Appendix 3
Ln Test of contemporaneous Correlation
The LN statistic for testing Ho: n=I against H1: n+1 is
given by
g i-l 2
X = n2 2p..
LN i=2 j=1 13
where
2
_ oij
Pij - -
011011
The test statistic is distributed as x2
with g(g-l)/2 degree
of freedom. In the five variable ERM estimated in Chapter V,
the value of the LM test statistic was 48.55508 which is
significant at the .01.
148
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