Premium
Preferences, entry, and market structure
Author(s) -
Bertoletti Paolo,
Etro Federico
Publication year - 2016
Publication title -
the rand journal of economics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.687
H-Index - 108
eISSN - 1756-2171
pISSN - 0741-6261
DOI - 10.1111/1756-2171.12155
Subject(s) - monopolistic competition , cournot competition , bertrand competition , comparative statics , economics , free entry , bertrand paradox (economics) , imperfect competition , microeconomics , market structure , mathematical economics , markup language , oligopoly , computer science , monopoly , xml , operating system
We provide a unified approach to imperfect (monopolistic, Bertrand, and Cournot) competition when preferences are symmetric over a finite but endogenous number of goods. Markups depend on the Morishima elasticity of substitution and on the number of varieties. The comparative statics of free‐entry equilibria is examined, establishing the conditions for markup neutrality with respect to income, market size, and productivity. We compare endogenous and optimal market structures for several non‐CES examples. With a generalized linear direct utility, the markup can be constant and optimal under monopolistic competition, and nonmonotonic in the number of firms under Bertrand or Cournot competition.