现代信息经济学是有关非对称信息下交易关系和合约安排的理论。自 196 9年首次颁发诺贝尔经济学纪念奖以来 ,到 2 0 0 1年 ,共有 49位经济学家获此殊荣 ,其中有 10位经济学家的获奖直接或间接与他们对信息经济学的贡献有关。本文比较全面评述了 2 0 0 1年三位获奖者对信息经济学的贡献。文章首先介绍了信息经济学 ,特别是非对称信息理论研究的主题 ,接着介绍阿克洛夫的逆向选择模型、斯宾塞的信号传递模型和斯蒂格里茨的信息甄别模型 ,最后讨论了不对称信息理论的主要应用领域。 Modern information economics is the theory of transactional relations and contractual arrangements under asymmetric information. A total of 49 economists have won this honor since 2001 when the Nobel Prize for Economics was first awarded in 1919. Of these, 10 economists won prizes either directly or indirectly in conjunction with their information economics Contributions related. This article provides a comprehensive review of the contribution of the three winners to information economics in 2001. The article first introduces the subject of information economics, especially asymmetric information theory, and then introduces Akerlof’s inverse selection model, Spencer’s signal transmission model and Stiglitz’s information screening model. Finally, it discusses not Symmetrical information theory of the main application areas.