How Oligopolies May Improve Consumers’ Welfare? R&D Is No Longer Required!

Alexander Sidorov

Research output: Chapter in Book/Report/Conference proceedingChapterResearchpeer-review


The paper studies how the industry concentration affects the Social welfare, which is measured as consumer’s indirect utility. Schumpeterian hypothesis tells that the harmful effect of oligopolization may be offset by positive externalities of concentration, such as innovations in technologies, R&D, etc. This contradicts to traditional neoliberal paradigm, which insists that concentration is always harmful for the end consumers. We study a general equilibrium model with two types of firms and imperfect price competition. Firms of the first type are monopolistic competitors with negligible impact to market statistics, subjected to typical assumptions, e.g., free entry until zero-profit cut-off. Unlike this, the firms of second type assumed to have non-zero impact to market statistics, in particular, to consumer’s income via distribution of non-zero profit across consumers-shareholders. Moreover, these large firms (oligopolies) allow for dependence of profits on their strategic choice, generating so called Ford effect. The first result we present is that in case of CES utility the concentration effect is generically harmful for consumers’ well-being. However, the result may be different for preferences, generating the demand with Variable Elasticity of Substitution (VES). We find the natural assumption on VES utilities, which hold for most of the commonly used classes of utility functions, such as Quadratic, CARA, HARA, etc., which allows to obtain the positive welfare effect, i.e., to justify Schumpeter hypothesis.

Original languageEnglish
Title of host publicationStatic and Dynamic Game Theory
Subtitle of host publicationFoundations and Applications
PublisherBirkhauser Verlag Basel
Number of pages22
Publication statusPublished - 1 Jan 2019

Publication series

NameStatic and Dynamic Game Theory: Foundations and Applications
ISSN (Print)2363-8516
ISSN (Electronic)2363-8524


  • Additive preferences
  • Bertrand competition
  • Ford effect
  • Monopolistic competition
  • Schumpeter hypothesis


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