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Estimating Production Functions Using Inputs to Control for Unobservables

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Listed author(s):
  • James Levinsohn
  • Amil Petrin

Abstract

We introduce a new method for conditioning out serially correlated unobserved shocks to the production technology by building ideas first developed in Olley and Pakes (1996). Olley and Pakes show how to use investment to control for correlation between input levels and the unobserved firm-specific productivity process. We prove that like investment, intermediate inputs (those inputs which are typically subtracted out in a value-added production function) can also solve this simultaneity problem. We highlight three potential advantages to using an intermediate inputs approach relative to investment. Our results indicate that these advantages are empirically important.

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File URL: http://www.nber.org/papers/w7819.pdf
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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 7819.

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Date of creation: Aug 2000
Publication status: published as Levinsohn, James and Amil Petrin. "Estimating Production Functions Using Inputs To Control For Unobservables," Review of Economic Studies, 2003, v70(2,Apr), 317-341.
Handle: RePEc:nbr:nberwo:7819
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  1. Basu, Susanto & Fernald, John G., 1995. "Are apparent productive spillovers a figment of specification error?," Journal of Monetary Economics, Elsevier, vol. 36(1), pages 165-188, August.
  2. Zvi Griliches & Jacques Mairesse, 1995. "Production Functions: The Search for Identification," NBER Working Papers 5067, National Bureau of Economic Research, Inc.
  3. Robinson, Peter M, 1988. "Root- N-Consistent Semiparametric Regression," Econometrica, Econometric Society, vol. 56(4), pages 931-954, July.
  4. Pakes, Ariel & Olley, Steven, 1995. "A limit theorem for a smooth class of semiparametric estimators," Journal of Econometrics, Elsevier, vol. 65(1), pages 295-332, January.
  5. Tybout, James & de Melo, Jamie & Corbo, Vittorio, 1991. "The effects of trade reforms on scale and technical efficiency : New evidence from Chile," Journal of International Economics, Elsevier, vol. 31(3-4), pages 231-250, November.
  6. James Levinsohn & Amil Petrin, 1999. "When Industries Become More Productive, Do Firms?," NBER Working Papers 6893, National Bureau of Economic Research, Inc.
  7. Levinsohn, J. & Petrin, A., 1999. "When Industries Become More Productive, Do Firms?: Investigating Productivity Dynamics," Working Papers 445, Research Seminar in International Economics, University of Michigan.
  8. repec:fth:michin:445 is not listed on IDEAS
  9. Olley, G Steven & Pakes, Ariel, 1996. "The Dynamics of Productivity in the Telecommunications Equipment Industry," Econometrica, Econometric Society, vol. 64(6), pages 1263-1297, November.
  10. Timothy Dunne & Mark J. Roberts & Larry Samuelson, 1988. "Patterns of Firm Entry and Exit in U.S. Manufacturing Industries," RAND Journal of Economics, The RAND Corporation, vol. 19(4), pages 495-515, Winter.
  11. Roberts, Mark J & Tybout, James R, 1997. "The Decision to Export in Colombia: An Empirical Model of Entry with Sunk Costs," American Economic Review, American Economic Association, vol. 87(4), pages 545-564, September.
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