John Bluedorn, Akos Valentinyi, Michael Vlassopoulos, 15 December 2009

Hot countries tend to be poorer. This column uses the cross-century, cross-country variation in climatic temperatures to estimate the effects of historic temperature upon current incomes. The negative relationship between current temperature and income appears due to temperature variations in the 18th and 19th centuries. That suggests that the consequences of climate change may be felt for a very long time.

Nathan Nunn, Diego Puga, 06 June 2007

African nations with ‘bad’ terrain suffered less from the slave trade. More than a century after the slave trade ended, the protective benefits of ruggedness still outweigh its contemporary economic disadvantages when it comes to GDP per capita.

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CEPR Policy Research