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Market Power with Dynamic Invertory Constraints: The Bias in Standard Measures

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  • Lynn Hunnicutt
  • David Aadland

Abstract

This paper incorporates inventory dynamics into an analysis of market power. Using a model in which each firm accounts for the effect of its current action on the current and future actions of itself and its competitors, we show that measures of market power that ignore inventory dynamics are biased. We then apply the model to the beef-packing industry using annual data on cattle stocks, slaughter and prices from 1933-1999. Our estimates suggest that static measures overestimate the amount of market power exerted by beef-packing firms.

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File URL: ftp://repec.bus.usu.edu/RePEc/usu/pdf/ERI2002-15.pdf
File Function: First version, 2002
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Bibliographic Info

Paper provided by Utah State University, Department of Economics in its series Working Papers with number 2002-15.

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Length: 26 pages
Date of creation: Aug 2002
Date of revision:
Handle: RePEc:usu:wpaper:2002-15

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  1. Pindyck, Robert S., 1984. "The measurement of monopoly power in dynamic markets," Working papers 1540-84., Massachusetts Institute of Technology (MIT), Sloan School of Management.
  2. Weliwita, Ananda & Azzam, Azzeddine M., 1996. "Identifying Implicit Collusion Under Declining Output Demand," Journal of Agricultural and Resource Economics, Western Agricultural Economics Association, vol. 21(02), December.
  3. Roberts, M.J. & Samuelson, L., 1988. "An Empirical Analysis Of Dynamic, Non-Price Competition In An Oligopolistic Industry," Papers 3-88-14, Pennsylvania State - Department of Economics.
  4. Bresnahan, Timothy F., 1989. "Empirical studies of industries with market power," Handbook of Industrial Organization, in: R. Schmalensee & R. Willig (ed.), Handbook of Industrial Organization, edition 1, volume 2, chapter 17, pages 1011-1057 Elsevier.
  5. Fershtman, Chaim & Kamien, Morton I, 1987. "Dynamic Duopolistic Competition with Sticky Prices," Econometrica, Econometric Society, vol. 55(5), pages 1151-64, September.
  6. Sanjib Bhuyan & Rigoberto A. Lopez, 1997. "Oligopoly Power in the Food and Tobacco Industries," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 79(3), pages 1035-1043.
  7. Driskill, Robert A. & McCafferty, Stephen, 1989. "Dynamic duopoly with adjustment costs: A differential game approach," Journal of Economic Theory, Elsevier, vol. 49(2), pages 324-338, December.
  8. Rosen, Sherwin & Murphy, Kevin M & Scheinkman, Jose A, 1994. "Cattle Cycles," Journal of Political Economy, University of Chicago Press, vol. 102(3), pages 468-92, June.
  9. Muth, Mary K. & Wohlgenant, Michael K., 1998. "A Model Of Imperfect Competition Using Marginal Input And Output Prices: Application To The Beef Packing Industry," 1998 Annual meeting, August 2-5, Salt Lake City, UT 20853, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
  10. Jarvis, Lovell S, 1974. "Cattle as Capital Goods and Ranchers as Portfolio Managers: An Application to the Argentine Cattle Sector," Journal of Political Economy, University of Chicago Press, vol. 82(3), pages 489-520, May/June.
  11. Baak, Saang Joon, 1999. "Tests for bounded rationality with a linear dynamic model distorted by heterogeneous expectations," Journal of Economic Dynamics and Control, Elsevier, vol. 23(9-10), pages 1517-1543, September.
  12. Nerlove, Marc & Fornari, Ilaria, 1998. "Quasi-rational expectations, an alternative to fully rational expectations: An application to US beef cattle supply," Journal of Econometrics, Elsevier, vol. 83(1-2), pages 129-161.
  13. Dockner, Engelbert J, 1992. "A Dynamic Theory of Conjectural Variations," Journal of Industrial Economics, Wiley Blackwell, vol. 40(4), pages 377-95, December.
  14. David Aadland & DeeVon Bailey, 2001. "Short-Run Supply Responses in the U.S. Beef-Cattle Industry," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 83(4), pages 826-839.
  15. Azzam, Azzeddine M, 1997. "Measuring Market Power and Cost-Efficiency Effects of Industrial Concentration," Journal of Industrial Economics, Wiley Blackwell, vol. 45(4), pages 377-86, December.
  16. Schroeter, John R., 1988. "Estimating the Degree of Market Power in the Beef Packing Industry," Staff General Research Papers 11114, Iowa State University, Department of Economics.
  17. Schroeter, John R. & Azzam, Azzeddine M., 1990. "Measuring Market Power in Multi-Product Oligopolies: The U.S. Meat Industry," Staff General Research Papers 11112, Iowa State University, Department of Economics.
  18. Corts, Kenneth S., 1998. "Conduct parameters and the measurement of market power," Journal of Econometrics, Elsevier, vol. 88(2), pages 227-250, November.
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