Spatial Correlation, Trade, and Inequality: Evidence from the Global Climate

Abstract

Global phenomena, such as climate change, often have local impacts that are spatially correlated.We show that greater spatial correlation of productivities can increase international inequality by increasing the correlation between a country's productivity and its gains from trade.We confirm this prediction using a half-century of exogenous variation in the spatial correlation of agricultural productivities induced by a global climatic phenomenon.We introduce this generalequilibrium effect into projections of climate-change impacts that typically omit spatial linkages and therefore do not account for the global scope of climate change.We project greater international inequality, with higher welfare losses across Africa.

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