Credit-risk decision model with imperfect information;

This paper puts forward a partners selection model for virtual enterprises under the conditions of imperfect information.

The entered enterprise should conserve its advertisement cost under the situation of stationary imperfect information and select its optimization advertisement decision according to the probability of percolate cost under the situation of dynamic imperfect information.

Programming method of fuzzy group multiple criteria decision making with incomplete information;

Study on hierarchical discrimination approach of multi-criteria classification with incomplete information;

Superiority and inferiority ranking method formultiple criteria decision making with incomplete information on weights;

Trough researching, the author found some problems related to imperfect information.

Based on the literature review,this paper adopts dynamic game theory of asymmetric information to analyse the game between minority shareholders and stock market,in order to emphasize the importance of protecting the benefits of minority shareholders.

This paper studied price regulation mechanism in asymmetric information,we have got the truth-telling equilibrium contract between the monopolist and the dealer.

This paper: Price decision model of Closed supply chain under Asymmetric information in Electron manufacturing industry was brought forward under the implementing of two indicators: <waste Electrical & Electronic Equipment> and <Restriction of Hazardous Substances>.