The impact of global climate change on developing countries is analyze
d using CGE-multimarket models for three archetype economies represent
ing the poor cereal importing nations of Africa, Asia, and Latin Ameri
ca. The objective is to compare the effects of climate change on the m
acroeconomic performance, sectoral resource allocation, and household
welfare across continents. Simulations help identify those underlying
structural features of economies which are the primary determinants of
differential impacts; these are suggestive of policy instruments to c
ountervail undesirable effects. Results show that all these countries
will potentially suffer income and production losses. However, Africa,
with its low substitution possibilities between imported and domestic
foods, fares worst in terms of income losses and the drop in consumpt
ion of low income households. Countervailing policies to mitigate nega
tive effects should focus on integration in the international market a
nd the production of food crops in Africa, and on the production of ex
port crops in Latin America and Asia.