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On welfare losses due to imperfect competition

  • Robert Ritz
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    Corporate managers and executive compensation in many industries place significant emphasis on measures of firm size, such as sales revenue or market share. Such objectives have an important yet thus far unquantified impact on market performance. With n symmetric firms, equilibrium welfare losses are of order 1/n4, and thus vanish extremely quickly. Welfare losses are less than 5% for many empirically relevant market structures, despite significant firm asymmetry and industry concentration. They can be estimated using only basic information on market shares. These results also apply to oligopsonistic competition (e.g., for retail bank deposits) and strategic forward trading (e.g., in restructured electricity markets). Forthcoming in Journal of Industrial Economics.

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    File URL: http://www.econ.cam.ac.uk/research/repec/cam/pdf/cwpe1334.pdf
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    Paper provided by Faculty of Economics, University of Cambridge in its series Cambridge Working Papers in Economics with number 1334.

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    Date of creation: 07 Oct 2013
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    Handle: RePEc:cam:camdae:1334
    Contact details of provider: Web page: http://www.econ.cam.ac.uk/index.htm

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