Andrea Guariso, Thorsten Rogall, 04 April 2017

There is a lively debate about the role of inequality as a trigger of ethnic conflicts. This column reports groundbreaking research into the effect of the amount of regional rainfall on crops, which is used to measure inequality between ethnic groups. Inequality caused by the weather's effect on crops has a large and significant impact on the prevalence of ethnic conflict. This effect is strongest when a lack of rainfall penalises ethnic groups with no access to power. 

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