Nobel economics prize goes to ‘natural experiments’ pioneers

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By Simon Johnson and Niklas Pollard STOCKHOLM (Reuters) -Economists David Card, Joshua Angrist and Guido Imbens won the 2021 Nobel economics prize on Monday for pioneering “natural experiments” to show real-world economic impacts in areas from minimum wage increases in the U.S. fast-food sector to migration from Castro-era Cuba. Unlike in medicine or other sciences, economists cannot conduct rigidly controlled clinical trials. Instead, natural experiments use real-life situations to study impacts on the world, an approach that has spread to other social sciences. “Their research has substantia…

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