在Knightian不确定性下连续交易无法实现Arrow-Debreu均衡
Non-Implementability of Arrow-Debreu Equilibria by Continuous Trading under Knightian Uncertainty
Center for Mathematical Economics, Bielefeld University(比勒费尔德大学数学经济中心)
AI总结:
本文研究了在Knightian不确定性下,连续交易无法实现Arrow-Debreu均衡的问题,指出只有在均衡分配的折现净交易具有无偏置时才能实现。
摘要:
在存在风险的情况下,Arrow-Debreu均衡可以通过少数长期证券的连续交易实现为Radner均衡。本文显示,如果存在Knightian不确定性,这一结果通常不成立。只有当均衡分配的折现净交易是无偏置时,才能实现。
英文摘要:
Under risk, Arrow-Debreu equilibria can be implemented as Radner equilibria by continuous trading of few long-lived securities. We show that this result generically fails if there is Knightian uncertainty in the volatility. Implementation is only possible if all discounted net trades of the equilibrium allocation are mean ambiguity-free.
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。