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Stochastic equilibria for economies under uncertainty with intertemporal substitution

机译:不确定性下跨期替代的经济体的随机均衡

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摘要

We consider the model of a stochastic pure exchange economy with a finite set of agents whose preferences exhibit local substitution in the sense of Hindy and Huang (1992). In order to prove the existence of Arrow-Debreu equilibria, it is assumed in Bank and Riedel (2001) that smooth subgradients exist (Assumption 1 in Bank and Riedel (2001)) and that they are uniformly bounded from above and away from zero (Assumption 2 in Bank and Riedel 2001). In this paper, we prove that the existence of smooth subgradients implies local properness of preferences. By a slight improvement of classical existence results of the literature, we prove that the local properness of preferences is a sufficient condition for the existence of equilibria, rendering Assumption 2 in Bank and Riedel (2001) superfluous.
机译:我们考虑一个随机的纯交换经济模型,该模型具有一组有限的主体,它们的偏好在Hindy和Huang(1992)的意义上表现出局部替代。为了证明Arrow-Debreu均衡的存在,在Bank and Riedel(2001)中假设存在光滑次梯度(Bank and Riedel(2001)中的假设1),并且它们均匀地从零上到零地有界(银行和Riedel中的假设2(2001)。在本文中,我们证明了光滑次梯度的存在暗示了偏好的局部正确性。通过对文献经典存在结果的略微改进,我们证明了偏好的局部正确性是均衡存在的充分条件,这使得Bank and Riedel(2001)中的假设2成为多余。

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