Ethnic Power RelationsThe Ethnic Power Relations dataset (EPR3) identifies all politically relevant ethnic groups and their access to state power in every country of the world from 1946 to 2010. It includes annual data for 157 counries and 758 groups and codes the degree to which their representatives held executive-level state power—from total control of the government to overt political discrimination. Version 3 also includes a new coding of type of ethnic marker distinguishing group members (religion, language, race, etc.).