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Jeremy T. Fox & Valérie Smeets, 2011. "Does Input Quality Drive Measured Differences In Firm Productivity?," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 52(4), pages 961-989, November. citation courtesy of

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The credible estimation of causal effects is a central task of applied econometrics. Two tools for this purpose that...