This thesis brings forward the right attribute and capacity structure of information access right bough re- analysis of Peter s reasoning process of information access freedom.

This paper built a media firms competition model in the free entry media markets based on the two-sided markets theoretical frame.

Free entry may induce intermediary firms′ quality game and strategic quality distortion, which will decrease social welfare and lead to inefficiency.

Based on the Salop circular city model,the paper studies the problem about the free entry and enterprise\'s horizontal merger in the markets with network externalities.

It is a milestone in the research field of information freedom.

This paper analyses the connotation of “information freedom” from a few angles, and it introduces standpoints and propositions relating to information freedom that some library professional organizations such as ALA and IFLA hold.

The network users privacy,individual information property rights,private virtual space property rights and information freedom system must be established in the civil legislation.

The Procedural system of the freedom of information is one of the most important systems established by the freedom of Information Act of the United States.

This paper expounds the concept of the freedom of information and the background and definition of the open access,analyzes the superiorities of the open access publishing mode,and discusses the promotion of the open access under the network condition to the freedom of information.