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arXiv 0901.2484q-fin.PMmath.OC
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时间不一致投资者的消费和投资组合规则

Consumption and Portfolio Rules for Time-Inconsistent Investors

Jesus Marin-Solano, Jorge Navas

摘要:

本文将经典的连续时间消费和投资组合规则模型(Merton 1969,1971)推广到具有时间不一致偏好的决策者框架。该模型是解决不同的效用函数,幼稚和复杂的代理,并比较结果。为了解决复杂代理的问题,我们推导出一个修改的HJB(Hamilton-Jacobi-Bellman)方程。它说明了如何为CRRA功能的家庭内的HARA功能(对数和潜在的情况下)的最优投资组合规则不依赖于贴现率,但这不是一个一般的效用函数,如指数(CARA)效用函数的情况。

英文摘要:

This paper extends the classical consumption and portfolio rules model in continuous time (Merton 1969, 1971) to the framework of decision-makers with time-inconsistent preferences. The model is solved for different utility functions for both, naive and sophisticated agents, and the results are compared. In order to solve the problem for sophisticated agents, we derive a modified HJB (Hamilton-Jacobi-Bellman) equation. It is illustrated how for CRRA functions within the family of HARA functions (logarithmic and potential cases) the optimal portfolio rule does not depend on the discount rate, but this is not the case for a general utility function, such as the exponential (CARA) utility function.

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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