不完全信息与有限理性的差别

不完全信息与有限理发的差别

西蒙提到的不完全信息、处理信息的费用和非传统的决策者目标函数没有抓住有限理性概念的要害,主流经济学可以将这三要件在完全理性最优决策和全部均衡的分析框架内全部吸收。瓦尔拉斯竞争模型是所有可能的激励机制中达至社会理性所需信息处理费用最小的激励机制。由于根本的不确定性,人们不可能算计自己决策与其它人决策的交互影响,只能依赖瓦尔拉斯定价机制通过社会试验逐步了解所有人决策互动及决策与价格互动的后果。

Simon actually misses the key point of 'limited reason' when he tries to for-mulize it with such major variables as incomplete information, information processing and the non-traditional policy-maker target function. In the mainstream economics, the three major variables have been successfully incorporated into the analytical framework of optimal policy - making with complete reason and overall equilibrium. The Walrasian competition model, among other incentive models, is the one that claims minimal infor-mation processing cost for social rationality to be achieved. Due to fundamental uncer-tainty, people cannot possibly calculate the interactive influence between oneself and other policy - makers. They can only figure out the result of interactive policy - making (between different policy - makers and between policy-making and price fluctuation) through the Walrasian pricing mechanism.