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Toward a theory of monopolistic competition

Listed author(s):
  • PARENTI, Mathieu

    ()

    (Université catholique de Louvain, CORE, Belgium; NRU-Higher School of Economics, Russia)

  • USHCHEV, Philip

    ()

    (NRU-Higher School of Economics, Russia)

  • THISSE, Jacques-François

    ()

    (Université catholique de Louvain, CORE, Belgium; NRU-Higher School of Economics, Russia; CEPR)

We propose a general model of monopolistic competition, which encompasses existing models while being flexible enough to take into account new demand and competition features. The basic tool we use to study the market outcome is the elasticity of substitution at a symmetric consumption pattern, which depends on both the per capita consumption and the total mass of varieties. We impose intuitive conditions on this function to guarantee the existence and uniqueness of a free-entry equilibrium. Comparative statics with respect to population size, GDP per capita and productivity shock are characterized through necessary and sufficient conditions. Finally, we show how our approach can be generalized to the case of a multisector economy and extended to cope with heterogeneous firms and consumers.

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Paper provided by Université catholique de Louvain, Center for Operations Research and Econometrics (CORE) in its series CORE Discussion Papers with number 2014046.

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Date of creation: 18 Nov 2014
Handle: RePEc:cor:louvco:2014046
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