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Market Power and TFP: Service differentiation in quality (Japanese)


  • KODAMA Naomi
  • KATO Atsuyuki


Although the factor share approach is used to estimate total factor productivity (TFP) in many empirical papers, its validity is very controversial. This approach is justifiable if and only if the market of inputs and outputs is perfectly competitive, the production function follows constant returns to scale (CRS), and the products are not differentiated. Among these strict assumptions, this paper relaxes the assumption of firm homogeneity in the product markets. Using qualitative data, we first examine the correlation between TFP and the market power of firms and then investigate what provides these firms with their market power. From this research, we obtained the following three main results. First, the TFP estimates based on the factor share approach include the effects of prices. Second, the gaps in product quality yield lead to the gaps in prices, and the quality factors related to the market power are the brand, specialization, and originality. Third, the service industries are not homogeneous; the TFP estimates by the factor share approach reflect more technical efficiency in the personal service sector than in the business service sector. Thus, the TFP estimates based on the factor share approach can be directly interpreted in policy discussion for the former sector. On the other hand, the sources of differentiation and the possible upward bias in the TFP estimates should be carefully considered in devising reasonable industrial policies for the business service sector.

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  • KODAMA Naomi & KATO Atsuyuki, 2010. "Market Power and TFP: Service differentiation in quality (Japanese)," Discussion Papers (Japanese) 10058, Research Institute of Economy, Trade and Industry (RIETI).
  • Handle: RePEc:eti:rdpsjp:10058

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    1. Andrei Shleifer & Florencio Lopez-de-Silanes & Rafael La Porta, 2008. "The Economic Consequences of Legal Origins," Journal of Economic Literature, American Economic Association, vol. 46(2), pages 285-332, June.
    2. Michel Aglietta & Antoine Rebérioux, 2005. "Corporate Governance Adrift," Books, Edward Elgar Publishing, number 3675.
    3. Nicholas Bloom & John Van Reenen, 2007. "Measuring and Explaining Management Practices Across Firms and Countries," The Quarterly Journal of Economics, Oxford University Press, vol. 122(4), pages 1351-1408.
    4. Julian FRANKS & Colin MAYER & MIYAJIMA Hideaki, 2009. "Equity Markets and Institutions: The case of Japan," Discussion papers 09039, Research Institute of Economy, Trade and Industry (RIETI).
    5. Hall, Peter A. & Gingerich, Daniel W., 2004. "Varieties of Capitalism and Institutional Complementarities in the Macroeconomy," MPIfG Discussion Paper 04/5, Max Planck Institute for the Study of Societies.
    6. Henry Hansmann & Reinier Kraakman, 2000. "The End Of History For Corporate Law," Yale School of Management Working Papers ysm136, Yale School of Management, revised 01 Feb 2001.
    7. Rafael La Porta & Florencio Lopez-de-Silanes & Andrei Shleifer & Robert W. Vishny, 1998. "Law and Finance," Journal of Political Economy, University of Chicago Press, vol. 106(6), pages 1113-1155, December.
    8. Streeck, Wolfgang & Thelen, Kathleen (ed.), 2005. "Beyond Continuity: Institutional Change in Advanced Political Economies," OUP Catalogue, Oxford University Press, number 9780199280469.
    9. Rajan, Raghuram G, 1992. " Insiders and Outsiders: The Choice between Informed and Arm's-Length Debt," Journal of Finance, American Finance Association, vol. 47(4), pages 1367-1400, September.
    10. Nicholas Bloom & Christos Genakos & Raffaella Sadun & John Van Reenen, 2011. "Management Practices Across Firms and Countries," CEP Discussion Papers dp1109, Centre for Economic Performance, LSE.
    11. Andrei Shleifer, 2009. "The Age of Milton Friedman," Journal of Economic Literature, American Economic Association, vol. 47(1), pages 123-135, March.
    12. Takeo Hoshi & Anil Kashyap & David Scharfstein, 1993. "The Choice Between Public and Private Debt: An Analysis of Post-Deregulation Corporate Financing in Japan," NBER Working Papers 4421, National Bureau of Economic Research, Inc.
    13. Masahiko Aoki & Gregory Jackson, 2008. "Understanding an emergent diversity of corporate governance and organizational architecture: an essentiality-based analysis -super-1," Industrial and Corporate Change, Oxford University Press, vol. 17(1), pages 1-27, February.
    14. Boyan Jovanovic & Peter L. Rousseau, 2002. "The Q-Theory of Mergers," American Economic Review, American Economic Association, vol. 92(2), pages 198-204, May.
    15. Park, Kwangwoo, 2002. "Foreign Ownership and Firm Value in Japan," CEI Working Paper Series 2002-15, Center for Economic Institutions, Institute of Economic Research, Hitotsubashi University.
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