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We study the effect of a firm winning an additional H-1B visa on the firm's outcomes, by comparing winning and losing firms in the Fiscal Year 2006 and 2007 H-1B visa lotteries. We match administrative data on the participants in these lotteries to the universe of approved U.S. patents, and to IRS data on the universe of U.S. firms. Winning additional H-1B visas has an insignificant effect on patenting within eight years, with confidence intervals that rule out moderate-sized or larger effects.doi:10.3386/w20668 fatcat:w66pmurmuzazdgsp3l5qvmbvku