Correspondence between lifetime minimum wealth and utility of consumption

被引:22
|
作者
Bayraktar, Erhan [1 ]
Young, Virginia R. [1 ]
机构
[1] Univ Michigan, Dept Math, Ann Arbor, MI 48109 USA
关键词
optimal control; probability of ruin; utility of consumption; investment/consumption decisions;
D O I
10.1007/s00780-007-0035-7
中图分类号
F8 [财政、金融];
学科分类号
0202 ;
摘要
We establish when the two problems of minimizing a function of lifetime minimum wealth and of maximizing utility of lifetime consumption result in the same optimal investment strategy on a given open interval O in wealth space. To answer this question, we equate the two investment strategies and show that if the individual consumes at the same rate in both problems-the consumption rate is a control in the problem of maximizing utility-then the investment strategies are equal only when the consumption function is linear in wealth on O, a rather surprising result. It then follows that the corresponding investment strategy is also linear in wealth and the implied utility function exhibits hyperbolic absolute risk aversion.
引用
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页码:213 / 236
页数:24
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