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The Possibility of Oversupply with External Economies

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  • Robin Boadway

    (Royal Military College)

Abstract

Until fairly recently, the Pigovian position that activities generating unpriced external economies would be undersupplied was universally accepted. It rested on the simple assertion that marginal social benefits exceeded marginal private benefits of the activity, and that, by equating the latter to the price,the marginal social benefit would exceed the price and the activity should be expanded. As a result in this paper, we have analysed the conditions under which oversupply could occur in the presence of external economies. In doing so, we have shown Baumol's analysis to be based upon a misleading definition of "externality". Furthermore,we have shown that the results arrived at by Vincent were faulty for several reasons. Also, the correct partial method is shown, but even it gives incorrect results. What is required is a simultaneous equation method to determine changes in a and b,such as is given in this paper.

Suggested Citation

  • Robin Boadway, 1971. "The Possibility of Oversupply with External Economies," Working Papers 63, Queen's University, Department of Economics.
  • Handle: RePEc:qed:wpaper:63
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    File URL: http://qed.econ.queensu.ca/working_papers/papers/qed_wp_63.pdf
    File Function: First version 1971
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    References listed on IDEAS

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    1. Olson, Mancur & Zeckhauser, Richard, 1970. "The Efficient Production of External Economies," American Economic Review, American Economic Association, vol. 60(3), pages 512-517, June.
    2. Vincent, Phillip E, 1969. "Reciprocal Externalities and Optimal Input and Output Levels," American Economic Review, American Economic Association, vol. 59(5), pages 976-984, December.
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