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Byron Wien, for decades one of the most influential voices on Wall Street, taught Israel how to understand macroeconomic questions like the difference between gross national product and gross domestic product. The government had switched the leading economic indicator from GNP to GDP, Wien explained to Israel, as a way to make it seem that the economy was growing faster—official sleight of hand understood by very few.
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Guy Lawson (Octopus: Sam Israel, the Secret Market, and Wall Street's Wildest Con)