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arXiv 1107.1895math.OCcs.SYeess.SYq-fin.PM
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关于具有制度转换的投资-消费问题

On Investment-Consumption with Regime-Switching

McMaster University(麦克马斯特大学);Nankai University(南开大学)

Traian A. Pirvu, Huayue Zhang

AI总结:

本文在连续时间随机经济中,考虑贴现率变化的代表性投资者的消费和投资问题,通过引入均衡策略并求解幂效用函数和闭式对数效用函数,研究了制度转换对最优消费和投资的影响。

摘要:

在连续时间随机经济中,本文考虑了金融市场中的消费和投资问题,其中代表性投资者的贴现率发生变化。投资机会包括股票和无风险账户。市场系数和贴现因子根据有限状态马尔可夫链进行转换。贴现率的变化导致投资者决策的时间不一致性。我们模型中的随机性由布朗运动和马尔可夫链驱动。遵循Ekeland等人(2008)的方法,我们引入并刻画了幂效用函数的均衡策略。此外,对于对数效用函数,我们以闭式形式计算了这些策略。我们表明,更高的贴现率导致更高的均衡消费率。数值实验展示了时间偏好和风险厌恶对均衡策略的影响。

英文摘要:

In a continuous time stochastic economy, this paper considers the problem of consumption and investment in a financial market in which the representative investor exhibits a change in the discount rate. The investment opportunities are a stock and a riskless account. The market coefficients and discount factor switches according to a finite state Markov chain. The change in the discount rate leads to time inconsistencies of the investor's decisions. The randomness in our model is driven by a Brownian motion and Markov chain. Following Ekeland etc (2008) we introduce and characterize the equilibrium policies for power utility functions. Moreover, they are computed in closed form for logarithmic utility function. We show that a higher discount rate leads to a higher equilibrium consumption rate. Numerical experiments show the effect of both time preference and risk aversion on the equilibrium policies.

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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