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Progrès technique et croissance de la productivité : estimations sur un panel incomplet de firmes ayant des qualités de production différentes


  • Georges Dionne
  • Robert Gagné


[eng] Measuring Technical Change and Productivity Growth with Varying Output Qualities . and Incomplete Panel Data par Georges Dionne and Robert Gagné . This paper presents a method for estimating technical change using incomplete panel data. In addition, we show how estimates of cost elasticities with respect to output qualities can be used to evaluate productivity growth adjusted for quality changes. In order to control for the incomplete nature of the sample used, specific dummy variables for entry in and exit from the sample are introduced into the cost function. The proposed methodology is applied to an unbalanced sample of trucking firms from Quebec. Results show that without correction for sample entry or exit, the estimated rate of technical change between 1987 and 1988 is -29,7%. When entry in or exit from the sample is taken into account, the estimated rate is -4,2%. Also, during the same period, the observed TFP growth rate is 63.4%. After adjustment for quality changes, this rate falls to -4,6%. [fre] Progrès technique et croissance de la productivité : estimations sur un panel incomplet de firmes ayant . des qualités de production différentes par Georges Dionne et Robert Gagné . Dans cet article, nous proposons une méthodologie permettant l'estimation du progrès technique avec un échantillon incomplet de firmes. Nous montrons comment les estimations des élasticités des coûts par rapport aux variables de qualité de la production peuvent être utilisées afin d'épurer le taux de croissance observé de la productivité des effets des changements de qualité. Afin de vérifier que l' échantillon utilisé est incomplet, nous introduisons dans la spécification de la fonction de coût des variables indicatrices relatives à l'entrée et à la sortie d'une firme de l'échantillon. Notre méthodologie est appliquée à un panel incomplet d'entreprises québécoises de transport par camion. Nos résultats montrent que sans correction pour l'entrée et la sortie de firmes de l'échantillon, l'estimation du progrès technique est de -29,7% entre 1987 et 1988 contre -4,2% pour le taux corrigé. De plus, au cours de la même période, le taux de croissance observé de la productivité est de 63,4% alors, qu'après correction pour les changements de qualité, ce taux est de -4,6%.

Suggested Citation

  • Georges Dionne & Robert Gagné, 1996. "Progrès technique et croissance de la productivité : estimations sur un panel incomplet de firmes ayant des qualités de production différentes," Économie et Prévision, Programme National Persée, vol. 126(5), pages 63-76.
  • Handle: RePEc:prs:ecoprv:ecop_0249-4744_1996_num_126_5_5823
    Note: DOI:10.3406/ecop.1996.5823

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    References listed on IDEAS

    1. Melvyn A. Fuss & Leonard Waverman, 1981. "Regulation and the Multiproduct Firm: The Case of Telecommunications in Canada," NBER Chapters,in: Studies in Public Regulation, pages 277-328 National Bureau of Economic Research, Inc.
    2. Daughety, Andrew F & Nelson, Forrest D, 1988. "An Econometric Analysis of Changes in the Cost and Production Structure of the Trucking Industry, 1953-1982," The Review of Economics and Statistics, MIT Press, vol. 70(1), pages 67-75, February.
    3. Ying, John S, 1990. "The Inefficiency of Regulating a Competitive Industry: Productivity Gains in Trucking Following Reform," The Review of Economics and Statistics, MIT Press, vol. 72(2), pages 191-201, May.
    4. Baltagi, Badi H & Griffin, James M & Rich, Daniel P, 1995. "Airline Deregulation: The Cost Pieces of the Puzzle," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 36(1), pages 245-260, February.
    5. Richard H. Spady & Ann F. Friedlaender, 1978. "Hedonic Cost Functions for the Regulated Trucking Industry," Bell Journal of Economics, The RAND Corporation, vol. 9(1), pages 159-179, Spring.
    6. Kim, Moshe, 1984. "The Beneficiaries of Trucking Regulation, Revisited," Journal of Law and Economics, University of Chicago Press, vol. 27(1), pages 227-241, April.
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    Cited by:

    1. Dionne, Georges & Gagne, Robert & Vanasse, Charles, 1998. "Inferring technological parameters from incomplete panel data," Journal of Econometrics, Elsevier, vol. 87(2), pages 303-327, September.
    2. Robert Gagne & Carmine Nappi, 2000. "The cost and technological structure of aluminium smelters worldwide," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 15(4), pages 417-432.

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