Spatial Correlation, Trade, and Inequality: Evidence from the Global Climate
研究发现生产率空间相关性越强，国家间不平等越大，因为一国生产率与其贸易收益的相关性增强。利用全球气候现象导致的农业生产率空间相关性外生变化验证了这一预测，并预测气候变化将加剧国际不平等，非洲福利损失更大。
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 general-equilibrium 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.