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The Dynamics of Market Structure and Market Size in Two Health Service Industries

In: Producer Dynamics: New Evidence from Micro Data

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  • Timothy Dunne
  • Shawn D. Klimek
  • Mark J. Roberts
  • Daniel Yi Xu

Abstract

The relationship between the size of a market and the competitiveness of the market has been of long-standing interest to IO economists. Empirical studies have used the relationship between the size of the geographic market and both the number of firms in the market and the average sales of the firms to draw inferences about the degree of competition in the market. This paper extends this framework to incorporate the analysis of entry and exit flows. A key implication of recent entry and exit models is that current market structure will likely depend upon history of past participation. The paper explores these issues empirically by examining producer dynamics for two health service industries, dentistry and chiropractic services. We find that the number of potential entrants and past number of incumbent firms are correlated with current market structure. The empirical results also show that as market size increases the number of firms rises less than proportionately, firm size increases, and average productivity increases. However, the magnitude of the correlations are sensitive to the inclusion of the market history variables.
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Suggested Citation

  • Timothy Dunne & Shawn D. Klimek & Mark J. Roberts & Daniel Yi Xu, 2009. "The Dynamics of Market Structure and Market Size in Two Health Service Industries," NBER Chapters, in: Producer Dynamics: New Evidence from Micro Data, pages 303-327, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberch:0490
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    1. Timothy Dunne & Shawn D. Klimek & Mark J. Roberts & Daniel Yi Xu, 2013. "Entry, exit, and the determinants of market structure," RAND Journal of Economics, RAND Corporation, vol. 44(3), pages 462-487, September.
    2. John Haltiwanger & Ron Jarmin & C. J. Krizan, 2010. "Mom-and-Pop Meet Big-Box: Complements or Substitutes?," NBER Chapters, in: Cities and Entrepreneurship, National Bureau of Economic Research, Inc.
    3. Daniel H. Weinberg, 2013. "Talent Recruitment and Firm Performance: The Business of Major League Sports," Working Papers 13-54r, Center for Economic Studies, U.S. Census Bureau, revised Feb 2014.
    4. Barseghyan, Levon & DiCecio, Riccardo, 2011. "Entry costs, industry structure, and cross-country income and TFP differences," Journal of Economic Theory, Elsevier, vol. 146(5), pages 1828-1851, September.
    5. Jae W. Sim, 2022. "Demand Shocks, Hysteresis and Monetary Policy," Finance and Economics Discussion Series 2022-080, Board of Governors of the Federal Reserve System (U.S.).
    6. Myrto Kalouptsidi, 2014. "Detection and Impact of Industrial Subsidies: The Case of World Shipbuilding," NBER Working Papers 20119, National Bureau of Economic Research, Inc.
    7. Daniel H. Weinberg, 2013. "Talent Recruitment and Firm Performance: The Business of Major League Sports," Working Papers 13-54, Center for Economic Studies, U.S. Census Bureau, revised Feb 2014.

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