Monotone Comparative Statics in Multi-Asset Portfolio Choice
Abstract
Arrow (1965) and Pratt (1964) laid the bedrock of portfolio theory by showing how risk aversion governs portfolio choice with one risky and one safe asset. Extending these insights to two risky assets proved elusive: Cass and Stiglitz (1972) and Hart (1975) showed that almost any portfolio response is possible, leaving a long-standing gap in our understanding. This paper closes that gap. It explains several empirical facts that are difficult to reconcile within the mean–variance framework. Mean–variance analysis is nested as a special case.
About the speaker
Language
English
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