货币交易的演化模型

摘要

An evolutionary model was proposed to investigate how the economy can evolve from a system of barter to monetary trade.The replicator equation was employed to describe the process how boundedly rational agents shift their strategies.In doing so, it is found that when the probability of monetary trade is larger than that of barter, the agents change their strategies from rejecting money to accepting money, and an alternative solution to the puzzle that the economy cannot shift from barter equilibrium to monetary one in monetary search model was presented.%提出了一个演化模型,用以研究经济是如何从物物交换转变为货币交易的.应用复制动态方程描述了有限理性的个体转变策略的过程.研究结果表明,当货币交易的概率大于物物交换的概率时,个体的策略将从拒绝货币转变为接受货币.从而解决了在货币搜寻模型中物物交换均衡无法转变为货币均衡的难题.