104 | Chapter 15
the form of in ationary excess demand or contractionary excess supply
that idles factors of production and leads to excessive unemployment. These
concepts are easy to depict using supply- and- demand analysis for tradables
and nontradables, with P as the price variable.
IV. Two key variables determining the macroeconomic outcome are aggregate
expenditure (absorption and the real exchange rate). A rise in absorption
increases demand for both tradables and nontradables. A rise in the real
exchange rate, by altering relative prices, induces a shift in consumption
toward nontradables and a shift in production toward tradables. Although
the markets possess self- correcting tendencies, structural rigidities can ren-
der the adjustments too slow to solve short- run crises; in addition, the auto-
matic adjustments can be counteracted by inappropriate policy responses.
V. The model reveals which combination of changes in absorption (A) and the
real exchange rate (P) is needed to restore microeconomic balance, starting
from any initial situation of external or internal imbalance. To simplify the
analysis, the model is presented in the form of a phase diagram with A and
P on the axes. In this diagram, the external balance line (EB) delineates
combinations of A and P for which the tradables market has a balance, a
surplus, or a de cit. Similarly, the internal balance line (IB) shows the com-
binations of A and P for which the market for nontradables has a balance,
asurplus of capacity (unemployment), or excess demand (in ation).
VI. Two main instruments are available to the government to help move the sys-
tem toward overall balance. First, monetary and scal policies directly affect
absorption; second, of cial exchange rate policy affects the real exchangerate.
VII. The Australian model is used to analyze the nature of macroeconomic
imbalances and the mix of policies needed to achieve stabilization. In gen-
eral, both policy instruments must be used in coordinated fashion to reach
the equilibrium. The essence of stabilization policy is to identify the disequi-
librium condition and then determine the warranted policy adjustments. For
countries suffering large external de cits and high domestic in ation, the
indicated response is austerity plus a real depreciation. This is standard IMF
prescription. One important detail is that the aid in ows ease the adjustment
pro cess by reducing the necessary dose of austerity and devaluation. The
model also provides a basis for analyzing the “Dutch disease,” the nature of
the debt repayment problem, and the macroeconomic effects of drought.
Boxed Examples
Box 15–1: Real versus Nominal Exchange Rates
Box 15–2: Pioneering Stabilization: Chile, 1973– 84