Welfare losses under cournot competition

Luis Corchon

UC3M Working papers. Economics from Universidad Carlos III de Madrid. Departamento de Economía

Abstract: We find that in a market for a homogeneous good where firms are identical, compete in quantities and produce with constant returns, the percentage of wel-fare losses (PWL) is small with as few as five competitors for a class of demand functions which includes linear and isoelastic cases. However with fixed costs and asymmetric firms PWL can be large. We provide exact formulae of PWL and robust constructions of markets were PWL is close to one in these two cases. We show that the market structure that maximizes PWL is either monopoly or dominant firm, depending on demand. Finally we prove that PWL is minimized when all firms are identical, a clear indication that the assumption of identical firms biases the estimation of PWL downwards.

Date: 2006-06
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Citations: View citations in EconPapers (2)

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Journal Article: Welfare losses under Cournot competition (2008)
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