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Long-Run Evaluation of Cost-Reducing Public Infrastructure Investment

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  • Matsumura, Toshihiro
  • Yamagishi, Atsushi

Abstract

We investigate public infrastructure investment that reduces production costs in oligopoly markets. The government decides on its public investment based on cost/benefit analysis that estimates the benefit as a reduction in production costs. In the short run, equilibrium investment falls short of the social optimum level (i.e. underinvestment) because it neglects the welfare gain of the subsequent production expansion. In the long run, equilibrium investment may exceed the social optimum level (i.e. overinvestment), depending on the demand and cost functions. This simple cost/benefit measure is thus conservative in the short run, but may not be from the long-run viewpoint.

Suggested Citation

  • Matsumura, Toshihiro & Yamagishi, Atsushi, 2016. "Long-Run Evaluation of Cost-Reducing Public Infrastructure Investment," MPRA Paper 75625, University Library of Munich, Germany.
    • Handle: RePEc:pra:mprapa:75625
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    References listed on IDEAS

    as
    1. Hiroaki Ino & Toshihiro Matsumura, 2012. "How Many Firms Should Be Leaders? Beneficial Concentration Revisited," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 53(4), pages 1323-1340, November.
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    More about this item

    Keywords

    cost-reducing public investment; free entry market; excessive investment;
    All these keywords.

    JEL classification:

    • D61 - Microeconomics - - Welfare Economics - - - Allocative Efficiency; Cost-Benefit Analysis
    • H54 - Public Economics - - National Government Expenditures and Related Policies - - - Infrastructures
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets

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