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John C. Haltiwanger is a Distinguished University Professor in the Department of Economics at the University of Maryland. He is also the first recipient of the Dudley and Louisa Dillard Professorship in 2013. He received his Ph.D. from the Johns Hopkins University in 1981. After serving on the faculty of UCLA and Johns Hopkins, he joined the faculty at Maryland in 1987. In the late 1990s, he served as Chief Economist of the U.S. Census Bureau. He is a Research Associate of the National Bureau of Economic Research, a Senior Research Fellow at the Center for Economic Studies at the U.S. Census Bureau, and a Fellow of the Society of Labor Economics and the Econometric Society. He has played a major role in developing and studying U.S. longitudinal firm-level data. Using these data, he has developed new statistical measures and analyzed the determinants of firm-level job creation, job destruction and economic performance. He has explored the implications of these firm dynamics for aggregate U.S. productivity growth and for the U.S. labor market.