| Any rational institutions should be designed for realizing the justice in society. To begin with this point in value, people pursue the achieving of the economical justice and the political justice by market and by government which is as the most influenced means. However, it is confirmed by history that the value point for justice is differential with that in reality because of the existence of market failure and government failure. According to analyzing this problem in this thesis, people found that asymmetry of information is one of the important reasons to lead such questions. It can be confirmed that the quantities of information people owned decide how and what people do in the society, and a perfect society should satisfied people with the need to know the live conditions. Only this need has been satisfied that the value pursuing for justice could be realized from ideal, further more, the apathetic action and the action followed blindly could be conquered, so the ultimate ideal in public administration could incline to the promotion of public benefits. From this logic, it is an important scale to measure the level of constitutional government that the right for people to know is one of the basic contents of democratic politics.Many discussion of the right of information sharing were carried from the angle of the constitutions and the administration laws. But in this thesis, the author will study deeply the question about asymmetry of information in economics, rethink the defects of market and government in the course of pursuing the justice in this society, try to apply the Information Economics to study the theory about public administration, and analyze the practical meaning and value of guaranteeing the citizen's right for information sharing in the condition of market economy.This thesis includes four section in content:First, the author defines the ideal theory of public administration-justice principle, and analyzes initially the relation between market and government.Second, from the study about that the government try to restrain market failure, the author discover the condition of imperfect information not only exists in private branch in the market, but also exists in public administration, having the aid of the existing conclusion in Information Economics, the author analyzes deeply the correlation between the condition that asymmetry of information and market failure and government failure. Specially, in the careful analysis of government failure from information economics angle, the author gets another define of the government failure. It is different with the traditional define in economics. And the author tries to argue that the different problem lead by asymmetry of information will be solved by guaranteeing the citizen's right for information sharing.Third, the author applies the information economics to explain the social problem about the condition of asymmetry of information in the course of politics. The questions are"principal-agent model" > "adverse selection" > "moral hazard"and"game problem". This part is the focal point of the thesis. According to the explain of the above question, the author tries to emerge a new analytic angle-use the information economics to explain the question existed in the study of public administration.Finally, combining with the social reality, the author tries to establish the specific principle institutions about ensuring and realizing the right for information sharing. And the author analyzes emphatically some focus questions in the society in the category of information economics. |