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The Institute for Fiscal Studies (IFS) is a UK-based think tank that analyzes the economic impact of government policies. It was founded in 1969 by a group of economists, including James Mirrlees, who served as its first director from 1969 to 1985. The IFS conducts research on a wide range of economic issues, including public finance, taxation, and social policy, and its findings are widely cited by policymakers and academics.