Lotteries, Sunspots, and Incentive Constraints

Lotteries, Sunspots, and Incentive Constraints
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彩票、太阳黑子和激励约束

DOI:
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发表时间:
2002
期刊:
Journal of Economics Theory
影响因子:
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通讯作者:
E. Prescott
E. Prescott
中科院分区:
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文献类型:
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作者:
T. Kehoe;D. Levine;E. Prescott

文献摘要

被引文献

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我们研究一类具有私人信息和个人的交换经济的原型。我们建立了彩票均衡和太阳黑子均衡之间的等价关系,并证明了福利和存在定理成立。为了建立这些结果,我们引入了替代消费者经济的概念,这是一个标准的凸的,有限的消费者,有限的好,纯交换经济。随着绝对风险厌恶的减少,没有individuality,我们证明了没有彩票实际上是在均衡中使用。我们提供了一个简单的数值例子,增加绝对风险厌恶,其中彩票必然用于均衡。我们还展示了如何在这个例子中的均衡分配可以实现在太阳黑子均衡。
We study a prototypical class of exchange economies with private information and indivisibilities. We establish an equivalence between lottery equilibria and sunspot equilibria and show that the welfare and existence theorems hold. To establish these results, we introduce the concept of the stand-in consumer economy, which is a standard convex, finite consumer, finite good, pure exchange economy. With decreasing absolute risk aversion and no indivisibilities, we prove that no lotteries are actually used in equilibrium. We provide a simple numerical example with increasing absolute risk aversion in which lotteries are necessarily used in equilibrium. We also show how the equilibrium allocation in this example can be implemented in a sunspot equilibrium.