An incomplete equilibrium with a stochastic annuity

An incomplete equilibrium with a stochastic annuity
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随机年金的不完全均衡

DOI:
10.1007/s00780-020-00415-6
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发表时间:
2020
影响因子:
1.7
通讯作者:
Žitković, Gordan
Žitković, Gordan
中科院分区:
经济学2区
文献类型:
--
作者:
Weston, Kim;Žitković, Gordan

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我们证明了一个不完全的、连续时间有限代理Radner均衡的全局存在性,在这个均衡中,指数代理在运行消耗和终端财富上都优化了它们的预期效用。市场由交易年金和未跨越收入组成,市场是不完整的。在布朗框架中,收入是由多维扩散驱动的,特别是包括均值回归动力学。用一个完全耦合的二次倒向随机微分方程系统来描述平衡,在马尔可夫假设下证明了其解的存在性。我们还证明了均衡分配只有在特殊情况下才会导致帕累托最优分配。
We prove the global existence of an incomplete, continuous-time finite-agent Radner equilibrium in which exponential agents optimise their expected utility over both running consumption and terminal wealth. The market consists of a traded annuity, and along with unspanned income, the market is incomplete. Set in a Brownian framework, the income is driven by a multidimensional diffusion and in particular includes mean-reverting dynamics. The equilibrium is characterised by a system of fully coupled quadratic backward stochastic differential equations, a solution to which is proved to exist under Markovian assumptions. We also show that the equilibrium allocations lead to Pareto-optimal allocations only in exceptional situations.
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DOI: 10.1007/s00780-011-0161-0
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