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Estudo

The ex-Ante non-optimality of the Dempster-Schafer updating rule for ambiguous beliefs

Dow, James; Werlang, Sérgio Ribeiro da Costa

O documento é disponibilizado pela fonte de origem, que mantém a versão integral e as condições de uso.

Resumo

The most widely used updating rule for non-additive probalities is the Dempster-Schafer rule. Schmeidles and Gilboa have developed a model of decision making under uncertainty based on non-additive probabilities, and in their paper 'Updating Ambiguos Beliefs' they justify the Dempster-Schafer rule based on a maximum likelihood procedure. This note shows in the context of Schmeidler-Gilboa preferences under uncertainty, that the Dempster-Schafer rule is in general not ex-ante optimal. This contrasts with Brown’s result that Bayes’ rule is ex-ante optimal for standard Savage preferences with additive probabilities.

Ficha do documento

Tipo
Estudo
Ano
1992
Instituição
Escola de Pós-Graduação em Economia da FGV
Idioma
Inglês
Acesso
Não informado
Identificador
oai:repositorio.fgv.br:10438/818

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