Models of export instability and empirical tests for less-developed countries

Abstract

Alternative models are developed in which export earnings instability is generated by domestic supply, domestic demand or foreign demand fluctuations. Their relative merits over the 1957–1972 period are examined through multiple regression analysis for a sample of 50 LDCs, with breakdown into sub-samples based on the type of commodity exported and the nature of foreign markets. The results suggest that export instability originates mainly from foreign sources - especially variations of market shares in foreign markets and commodity groups. However, domestic supply and demand fluctuations are the dominant factors for countries highly-dependent on food exports. Geographic concentration is an important factor for countries dependent on food exports and developed-country markets.