时间一致性、时间分辨率无差异以及时间与风险的分离

Time consistency, temporal resolution indifference, and the separation of time and risk

Theoretical Economics · 2026
被引 1 · 同刊同年前 7%
人大 AABS 4

中文导读

研究在消费-投资组合选择问题中,时间一致性、时间与风险偏好分离以及对风险解决时间无差异这三个性质同时成立的条件,发现偏离这些条件会导致时间一致性出现微小偏差。

Abstract

For general choice spaces, standard dynamic preference models cannot simultaneously satisfy the properties of time consistency, the separation of time and risk preferences, and the ability to accommodate an indifference to the timing of when risk is resolved. In the context of a consumption‐portfolio choice problem often underlying asset pricing and macro models, we derive necessary and sufficient conditions such that all three properties are satisfied. We also show that quantitatively reasonable deviations from our sufficient conditions can result in surprisingly small deviations from time consistency holding.

时间一致性时间风险分离风险解决时机无差异消费-投资组合选择