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On estimating firm-level production functions using proxy variables to control for unobservables

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  • Wooldridge, Jeffrey M.

Abstract

In the common case where polynomial approximations are used for unknown functions, I show how proxy variable approaches to controlling for unobserved productivity, proposed by Olley and Pakes [Olley, S. and Pakes, A., 1996. The dynamics of productivity in the telecommunications equipment industry. Econometrica 64, 1263-1298.] and Levinsohn and Petrin (Levinsohn, J. and Petrin, A., 2003. Estimating production functions using inputs to control for unobservables. Review of Economic Studies 70, 317-341.], can be implemented by specifying different instruments for different equations and applying generalized method of moments. Studying the parameters within a two-equation system clarifies some key identification issues, and joint estimation of the parameters leads to simple inference and more efficient estimators.

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Bibliographic Info

Article provided by Elsevier in its journal Economics Letters.

Volume (Year): 104 (2009)
Issue (Month): 3 (September)
Pages: 112-114

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Handle: RePEc:eee:ecolet:v:104:y:2009:i:3:p:112-114

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Web page: http://www.elsevier.com/locate/ecolet

Related research

Keywords: Production function Panel data Proxy variables Generalized method of moments;

References

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  1. George S Olley & Ariel Pakes, 1992. "The Dynamics Of Productivity In The Telecommunications Equipment Industry," Working Papers 92-2, Center for Economic Studies, U.S. Census Bureau.
  2. Ackerberg, Daniel & Caves, Kevin & Frazer, Garth, 2006. "Structural identification of production functions," MPRA Paper 38349, University Library of Munich, Germany.
  3. Amil Petrin & Brian P. Poi & James Levinsohn, 2004. "Production function estimation in Stata using inputs to control for unobservables," Stata Journal, StataCorp LP, vol. 4(2), pages 113-123, June.
  4. Wooldridge, Jeffrey M., 1996. "Estimating systems of equations with different instruments for different equations," Journal of Econometrics, Elsevier, vol. 74(2), pages 387-405, October.
  5. James Levinsohn & Amil Petrin, 2000. "Estimating Production Functions Using Inputs to Control for Unobservables," NBER Working Papers 7819, National Bureau of Economic Research, Inc.
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  1. (Mis)Allocation and Growth Reading List
    by dvollrath in The Growth Economics Blog on 2014-05-23 17:12:36
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