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We consider individual's portfolio selection problems. Introducing the concept of ambiguity, we show the existence of portfolio inertia under the assumptions that decision maker's beliefs are captured by an inner measure, and that her preferences are represented by the Choquet integral with...
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marginal utility for wealth necessarily is facilitated by a risk premium function that only robustly is parameterized with … reference to `relative safety', as opposed to `relative riskiness' of assets, a risk premium function that then explicitly is …). Robustness of the finding is evident in arrival at a parameterization of loss aversion (a concave risk premium function) that is …
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