Imports under a Foreign Exchange Constraint

To assess proposed macroeconomic adjustment programs, policymakersmust estimate import demand relative to the foreign exchangeavailable. Traditional models estimate import demand as a functionof relative prices (the real exchange rate) and income (grossdomestic product) but omit changes in foreign exchange. In the1980s, however, declines in foreign lending and the terms oftrade and increased debt service costs reduced foreign exchangeavailability in most developing countries and limited importcapacity. In this article two import models are presented which incorporateboth the traditional variables and indicators of import capacity—foreignexchange inflows and international reserves. The first modelassumes that import prices are exogenous, but in the secondmodel import prices are endogenous—allowing for governmentattempts to reduce import demand by increasing the domesticimport price. The models are estimated using data for twenty-onedeveloping countries for 1970–83. The results suggestthat the import model presented here does a better job of explainingimport behavior than do the traditional model (which excludeschanges in foreign exchange) and the Hemphill model (which excludesrelative import prices and income).