CONFLICTS CAN ARISE IN
BIG COUNTRIES
SMALL COUNTRIES
DIVERSE COUNTRIES
ANY COUNTRY
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When five economists and social scientists set out to measure ethnic diversity for a landmark 2002 paper for the Harvard Institute of Economic Research, they started by comparing data from an array of different sources: national censuses, Encyclopedia Brittanica, the CIA, Minority Rights Group International and a 1998 study called "Ethnic Groups Worldwide." They looked for consistence and inconsistence in the reports to determine what data set would be most reliable and complete. Because data sources such as censuses or surveys are self-reported – in other words, people are classified how they ask to be classified – the ethnic group data reflects how people see themselves, not how they're categorized by outsiders. Those results measured 650 ethnic groups in 190 countries.
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