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Products and Productivity

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  • Peter K. Schott
  • Andrew B. Bernard
  • Stephen J. Redding

Abstract

Firms' decisions about which goods to produce are often made at a more disaggregate level than the data observed by empirical researchers. When products differ according to production technique or the way in which they enter demand, this data aggregation problem introduces a bias into standard measures of firm productivity. We develop a theoretical model of heterogeneous firms endogenously self-selecting into heterogeneous products. We characterize the bias introduced by unobserved variation in product mix across firms, and the implications of this bias for identifying firm and industry responses to exogenous policy shocks such as deregulation. More generally, we demonstrate that product switching gives rise to a richer set of industry-level dynamics than models where firm product mix remains fixed.

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Bibliographic Info

Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 11575.

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Date of creation: Aug 2005
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Publication status: published as Andrew B. Bernard & Stephen J. Redding & Peter K. Schott, 2009. "Products and Productivity," Scandinavian Journal of Economics, Blackwell Publishing, vol. 111(4), pages 681-709, December.
Handle: RePEc:nbr:nberwo:11575

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