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Products and Productivity

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

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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Paper provided by Centre for Economic Performance, LSE in its series CEP Discussion Papers with number dp0699.

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Date of creation: Jul 2005
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Handle: RePEc:cep:cepdps:dp0699
Contact details of provider: Web page: http://cep.lse.ac.uk/_new/publications/series.asp?prog=CEP

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