Performance, Career Dynamics, and Span of Control”. With Michael Waldman and Frederic Warzynski. Forthcoming, Journal of Labor Economics.

 Rethinking De-Industrialization” (2017), Economic Policy, Editor’s choice, Volume 32(89), 5-38. With Andrew Bernard and Frederic Warzynski (Previously published as NBER working paper 22114).

Can Firms Oversee More Workers with Fewer Managers” (2017), IZA World of Labor, February 2017.

An Empirical Analysis of Post-Merger Organizational Integration” (2016), Scandinavian Journal of Economics, March 2016. With Mike Gibbs and Kathryn Ierulli.

Estimating Productivity with Multi-Product Firms, Pricing Heterogeneity and the Role of International Trade” (2013), Journal of International Economics, lead article, Volume 90 (2), 237-244. With Frederic Warzynski.

Wage Structure and Research Performance of U.S. Economics Departments: Distinguishing Incentives from Sorting” (2012), Revue dęEconomie Politique, (Special Issue on the Economics of Science), Volume 122 (4), 565-584. With Tom Coupé and Frederic Warzynski.

Does Input Quality Drive Measured Differences in Firm Productivity” (2011), International Economic Review, lead article, Volume 52(4), 961-989. With Jeremy Fox. (Previously published as NBER working paper 16853)

Small Open Economy Firms in International Trade: Evidence from Danish Transactions-Level Data” (2009), NationalŅkonomisk Tidsskrift/Danish Economic Journal, Volume 147(2), 175-194. With Tor Eriksson and Frederic Warzynski.

Equal opportunities at Novo Nordisk” (2008), World at Work, 16(4), 66-81. With Nikolaj Halse and Frederic Warzynski

Too Many Theories, Too Few Facts? What the Data Tell Us About the Link Between Span of Control, Compensation and Career Dynamics” (2008), Labor Economics, Volume 15(4), 687-703. With Frederic Warzynski.

Does the Academic Labor Market Initially Allocate New Graduates Efficiently?” (2006), Journal of Economic Perspectives, Volume 20(3), 161-172. With Tom Coupé and Frederic Warzynski.

Incentives, Sorting and Productivity along the Career: Evidence from a Sample of Top Economists” (2006), Journal of Law, Economics and Organization, Volume 20(1), 137-167. With Tom Coupé and Frederic Warzynski.

Job Creation, Job Destruction and Voting Behavior in Poland” (2006), European Journal of Political Economy, Volume 20, 503-519. With Frederic Warzynski.


Working papers


Multi-Product Firms, Import Competition, and the Evolution of Firm-product Technical Efficiencies”. With Emmanuel Dhyme, Amil Petrin and Frederic Warzynski, NBER working paper 23637, July 2017.

Offshoring and Reorganization” (joint with Andrew Bernard, Teresa Fort and Frederic Warzynski), January 2017.

Physical Productivity and Exceptional Exporter Performance: Evidence from a Chinese Production Survey” (with Yao Amber Li and Frederic Warzynski), January 2017.

Offshoring and the Shortening of the Quality Ladder: Evidence from Danish Apparel”. With Sharon Traiberman and Frederic Warzynski, April 2016.