Wer hat ein Problem mit irrationalen Präferenzen? Entscheidungstheorie und Überlegungsgleichgewicht

Studia Philosophica: Jahrbuch Der Schweizerischen Philosoph Ischen Gesellschaft, Annuaire de la Société Suisse de Philosphie 68:11-41 (2009)
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Abstract

Decision theory explicates norms of rationality for deriving preferences from preferences and beliefs. Empirical studies have found that actual preferences regularly violate these norms, launching a debate on whether this shows that subjects are prone to certain forms of irrationality or that decision theory needs to be revised. It has been claimed that such a revision is necessitated by the fact that normative uses of decision theory must be justified by a reflective equilibrium. The paper discusses three points. First, the debate over the impact of empirical studies on decision theories is only meaningful with respect to a decision theory that includes not only a formal system but also a theory of application. Second, differences in the concepts of reflective equilibrium appealed to are a source of confusion in the debate on rationality. Third, the assumption that normative uses of decision theory are justified by reflective equilibrium is not sufficient ground for arguing that the empirical studies call for a revision of decision theory. Such an argument must rely on substantive claims about rationality, preferences and beliefs.

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Georg Brun
University of Bern

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