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Inefficiencies in the Japanese National Health Insurance system: A stochastic frontier approach

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  • Yuda, Michio

Abstract

In this study, I examine the cost inefficiency and production inefficiency of municipal insurers operating under the Japanese National Health Insurance system. I employ insurer-level panel data for 2005 and 2010 and adopt stochastic frontier cost and production models to overcome analytical problems encountered in previous studies. The cost frontier estimates indicate that adverse effects on efficiency are associated with aging of the insured population, soft budget constraints due to government subsidies, insurer contributions to the elder care systems, and an increase in care provider densities. A positive effect on efficiency is associated with an expansion in insurer scale. The production frontier estimates suggest that cost inefficiencies decreased by roughly 15 percent between 2005 and 2010. The correlation between cost inefficiency and technical inefficiency is not particularly strong, whereas the correlation between cost inefficiency and allocative inefficiency is strong and positive.

Suggested Citation

  • Yuda, Michio, 2016. "Inefficiencies in the Japanese National Health Insurance system: A stochastic frontier approach," Journal of Asian Economics, Elsevier, vol. 42(C), pages 65-77.
  • Handle: RePEc:eee:asieco:v:42:y:2016:i:c:p:65-77
    DOI: 10.1016/j.asieco.2016.01.001
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    References listed on IDEAS

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    1. Yuda, Michio, 2013. "Medical Fee Reforms, Changes In Medical Supply Densities, And Supplier-Induced Demand: Empirical Evidence From Japan," Hitotsubashi Journal of Economics, Hitotsubashi University, vol. 54(1), pages 79-93, June.
    2. Willam Greene, 2005. "Fixed and Random Effects in Stochastic Frontier Models," Journal of Productivity Analysis, Springer, vol. 23(1), pages 7-32, January.
    3. Federico Belotti & Silvio Daidone & Giuseppe Ilardi & Vincenzo Atella, 2013. "Stochastic frontier analysis using Stata," Stata Journal, StataCorp LP, vol. 13(4), pages 718-758, December.
    4. Jarraya, Bilel & Bouri, Abdelfettah, 2012. "Efficiency concept and investigations in insurance industry: A survey," MPRA Paper 53544, University Library of Munich, Germany, revised 2013.
    5. Laurie J. Bates & Kankana Mukherjee & Rexford E. Santerre, 2010. "Medical Insurance Coverage and Health Production Efficiency," Journal of Risk & Insurance, The American Risk and Insurance Association, vol. 77(1), pages 211-229, March.
    6. Greene, William H., 1980. "On the estimation of a flexible frontier production model," Journal of Econometrics, Elsevier, vol. 13(1), pages 101-115, May.
    7. Federico Belotti & Giuseppe Ilardi, 2012. "Consistent Estimation of the “True” Fixed-effects Stochastic Frontier Model," CEIS Research Paper 231, Tor Vergata University, CEIS, revised 18 Apr 2012.
    8. Schmidt, Peter & Knox Lovell, C. A., 1979. "Estimating technical and allocative inefficiency relative to stochastic production and cost frontiers," Journal of Econometrics, Elsevier, vol. 9(3), pages 343-366, February.
    9. Julian Le Grand, 2007. "Introduction to The Other Invisible Hand: Delivering Public Services through Choice and Competition," Introductory Chapters, in: The Other Invisible Hand: Delivering Public Services through Choice and Competition, Princeton University Press.
    10. Battese, G E & Coelli, T J, 1995. "A Model for Technical Inefficiency Effects in a Stochastic Frontier Production Function for Panel Data," Empirical Economics, Springer, vol. 20(2), pages 325-332.
    11. Meeusen, Wim & van den Broeck, Julien, 1977. "Efficiency Estimation from Cobb-Douglas Production Functions with Composed Error," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 18(2), pages 435-444, June.
    12. Aigner, Dennis & Lovell, C. A. Knox & Schmidt, Peter, 1977. "Formulation and estimation of stochastic frontier production function models," Journal of Econometrics, Elsevier, vol. 6(1), pages 21-37, July.
    13. Greene, William, 2005. "Reconsidering heterogeneity in panel data estimators of the stochastic frontier model," Journal of Econometrics, Elsevier, vol. 126(2), pages 269-303, June.
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    Cited by:

    1. Zhou, Sheng & Xu, Zhiwei, 2022. "Energy efficiency assessment of RCEP member states: A three-stage slack based measurement DEA with undesirable outputs," Energy, Elsevier, vol. 253(C).

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    More about this item

    Keywords

    Cost inefficiency; Decomposition of cost inefficiency; Stochastic frontier model; Japanese National Health Insurance system; Japan;
    All these keywords.

    JEL classification:

    • C31 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Cross-Sectional Models; Spatial Models; Treatment Effect Models; Quantile Regressions; Social Interaction Models
    • H71 - Public Economics - - State and Local Government; Intergovernmental Relations - - - State and Local Taxation, Subsidies, and Revenue
    • H72 - Public Economics - - State and Local Government; Intergovernmental Relations - - - State and Local Budget and Expenditures
    • H75 - Public Economics - - State and Local Government; Intergovernmental Relations - - - State and Local Government: Health, Education, and Welfare
    • I1 - Health, Education, and Welfare - - Health
    • I13 - Health, Education, and Welfare - - Health - - - Health Insurance, Public and Private

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