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Previous issue date: 2012-05-16 / In oligopoly theories based on Nash Equilibrium and related concepts, free entry is associated with the coexistence of more than one rm. On the other hand, in the monopoly literature some reasons are identi ed as possible explanations to the permanence of a single pro table rm in the market, but usually do not rely on Nash Equilibrium concept. Here, we provide examples in a game-theoretical approach where randomization between monopoly prices is a new possible explanation for a pro table monopoly with free entry. We construct models where, due to the multidimensionality of goods and heterogeneity of consumers, more than one monopoly price arise, allowing randomization in equilibrium. / Em teorias de oligop olio baseadas em Equil brios de Nash e conceitos derivados, livre entrada e associada a coexist^encia de uma ou mais rmas. Por outro lado, teorias de monop olio que tentam explicar a aus^encia de concorrentes em ambientes com livre entrada n~ao se baseiam em equil brios de Teoria dos Jogos. Neste trabalho, usando um arcabou co de Teoria dos Jogos, apresento exemplos em que randomiza c~ao entre pre cos de monop olio e uma nova poss vel explica c~ao para a exist^encia de um monopolista com lucros positivos quando h a livre entrada. S~ao constru dos modelos onde, devido a multidimensionalidade dos bens e heterogeneidade dos consumidores, existe mais de um pre co de monop olio, possibilitando randomiza c~ao em equil brio.
| Identifer | oai:union.ndltd.org:IBICT/oai:bibliotecadigital.fgv.br:10438/9944 |
| Date | 16 May 2012 |
| Creators | Shalders, Felipe Leon Peres Camargo |
| Contributors | Coimbra-Lisboa, Paulo César, Polydoro, Angelo Luiz Rocha, Escolas::EPGE, FGV, Braido, Luís H. B. |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional do FGV, instname:Fundação Getulio Vargas, instacron:FGV |
| Rights | info:eu-repo/semantics/openAccess |
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