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Pertes de bien-être et pouvoir de marché dans l'agro-alimentaire français

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  • Michel Simioni
  • Vincent Réquilllart
  • Pascal Lavergne

Abstract

[eng] Losses of Welfare and Market Power in the French Food Industry by Pascal Lavergne, Vincent Réquillart and Michel Simioni . We study the practical problems of estimating losses of welfare resulting from market power. Particular attention is paid to the specification of demand functions, the evaluation of deviations between marginal costs and prices and the calculation of Hicksian losses of welfare. We evaluate the losses of welfare for 31 French food sectors and show that the Marshallian consumers' surplus measurement is a good approximation of the Hicksian surplus measurement. However, the Marshallian loss of welfare measurement does not provide a good approximation of the corresponding Hicksian measurement. Lastly, the different approximations of the marginal cost-price deviation produce considerably different sector rankings by extent of losses of welfare. [fre] Pertes de bien-être et pouvoir de marché dans l'agro-alimentaire français par Pascal Lavergne, Vincent Réquillart et Michel Simioni . Nous étudions les problèmes pratiques posés par l'estimation des pertes de bien-être résultant d'un pouvoir de marché. Une attention particulière est portée à la spécification des fonctions de demande, à l'évaluation des écarts entre prix et coûts marginaux et au calcul des pertes hicksiennes de bien-être. Nous évaluons les pertes de bien-être pour 31 branches de l'agro-alimentaire français et montrons que la mesure marshallienne du surplus du consommateur constitue une bonne approximation de la mesure hicksienne du surplus. Par contre, la mesure marshallienne de la perte de bien-être ne fournit pas une bonne approximation de la mesure hicksienne correspondante. Enfin, les classements des branches selon l'importance des pertes de bien-être obtenues pour différentes approximations de l'écart prix-coût marginal diffèrent sensiblement.

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Bibliographic Info

Article provided by Programme National Persée in its journal Économie & prévision.

Volume (Year): 135 (1998)
Issue (Month): 4 ()
Pages: 77-86

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Handle: RePEc:prs:ecoprv:ecop_0249-4744_1998_num_135_4_5924

Note: DOI:10.3406/ecop.1998.5924
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Web page: http://www.persee.fr/web/revues/home/prescript/revue/ecop

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  1. Cowling, Keith & Waterson, Michael, 1976. "Price-Cost Margins and Market Structure," Economica, London School of Economics and Political Science, vol. 43(171), pages 267-74, August.
  2. Connor, John M. & Peterson, Everett B., 1991. "Market-Structure Determinants Of National Brand-Private Label Price Differences Of Manufactured Food Products," Working Papers 116099, Regional Research Project NE-165 Private Strategies, Public Policies, and Food System Performance.
  3. Jenny, Frederic & Weber, Andre-Paul, 1983. "Aggregate Welfare Loss Due to Monopoly Power in the French Economy: Some Tentative Estimates," Journal of Industrial Economics, Wiley Blackwell, vol. 32(2), pages 113-30, December.
  4. Vartia, Yrjo O, 1983. "Efficient Methods of Measuring Welfare Change and Compensated Income in Terms of Ordinary Demand Functions," Econometrica, Econometric Society, vol. 51(1), pages 79-98, January.
  5. Hausman, Jerry A, 1981. "Exact Consumer's Surplus and Deadweight Loss," American Economic Review, American Economic Association, vol. 71(4), pages 662-76, September.
  6. Liebowitz, S J, 1982. "What Do Census Price-Cost Margins Measure?," Journal of Law and Economics, University of Chicago Press, vol. 25(2), pages 231-46, October.
  7. Alan J. Auerbach, 1982. "The Theory of Excess Burden and Optimal Taxation," NBER Working Papers 1025, National Bureau of Economic Research, Inc.
  8. John M Connor & Everett B. Peterson, 1996. "A Comparison of Oligopoly Welfare Loss Estimates for U.S. Food Manufacturing: Reply," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 78(3), pages 710-711.
  9. Pagoulatos, Emilio & Sorensen, Robert, 1986. "What determines the elasticity of industry demand?," International Journal of Industrial Organization, Elsevier, vol. 4(3), pages 237-250, September.
  10. Willner, Johan, 1989. "Price Leadership and Welfare Losses in U.S. Manufacturing: Comment," American Economic Review, American Economic Association, vol. 79(3), pages 604-09, June.
  11. Gisser, Micha, 1986. "Price Leadership and Welfare Losses in U.S. Manufacturing," American Economic Review, American Economic Association, vol. 76(4), pages 756-67, September.
  12. Breslaw, Jon A & Smith, J Barry, 1995. "A Simple and Efficient Method for Estimating the Magnitude and Precision of Welfare Changes," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 10(3), pages 313-27, July-Sept.
  13. Willig, Robert D, 1976. "Consumer's Surplus without Apology," American Economic Review, American Economic Association, vol. 66(4), pages 589-97, September.
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