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Behavioural Portfolio Choice and the Equity Premium Puzzle
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When
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17.00
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Where
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H101, Connaught House
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Presentations
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Speaker
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Xunyu Zhou
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From
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Mathematical Institute, University of Oxford
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Abstract
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In this talk we introduce a single-period portfolio choice model under Kahneman and Tversky's cumulative prospect theory, featuring a reference point in wealth, S-shaped utility (value) functions with loss aversion, and distortions in probability.
A new measure of loss aversion for large payoffs, called the loss aversion degree (LAD), is introduced. The issue of model well-posedness is brought about, of which the LAD is shown to be a critical determinant. The optimal solutions are derived explicitly for two special cases when the reference point is the risk-free return and when the utilities are linear. These results are finally employed to examine, both analytically and numerically, the Benartzi--Thaler myopic loss aversion resolution to the equity premium puzzle. It is found that the solutions produced by the model are consistent with the previously estimated parameters in terms of the loss aversion degree, the planning horizon and the size of the equity premium.
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For further information
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Tom Hewlett (Postgraduate Administrator) Ext. 6879
Department of Statistics, Columbia House
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