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arXiv math/0703820math.OCmath.PRq-fin.GN
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终身最小财富与消费效用的对应

Correspondence between Lifetime Minimum Wealth and Utility of Consumption

Erhan Bayraktar, Virginia R. Young

摘要:

在给定的开区间$O$上,我们建立了最小化终身最小财富函数和最大化终身消费效用函数这两个问题在财富空间中何时导致相同的最优投资策略.为了回答这个问题,我们将这两种投资策略等同起来,并表明,如果个人在两个问题中的消费率相同--消费率是效用最大化问题中的控制因素--那么只有当消费函数在$O$上与财富成线性关系时,这两种投资策略才相等,这是一个相当令人惊讶的结果。因此,相应的投资策略也是财富线性的,隐含的效用函数表现出双曲绝对风险厌恶。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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