By calculating the change of social welfare and effective competition some proposals in antitrust policy are made.

Thus under usage-based pricing, in the monopoly market the maximum social welfare can t be accomplished; competitions between ISPs bring the improvement of users utility; while the price under which the maximum social welfare is accomp.

Only the mode that the follower firms carry out horizontal merger of the follower firms to become a leader did benefit to social welfare under some conditions, the other merger modes all did harm for consumer\' benefit and social welfare.

Influences of parallel imports policy of patented goods on social welfare and China s countermeasures;

Research on Factors Selection of Production and Social Welfare;

A Method of Measuring the Social Welfare on Homogeous Product Market;

This article analyzes that agric(?)ltural insurance is advantageous to improvement of society welfare.

We show that the presence of the pre-opening period enhance the liquidity and improve society welfare.

Social Parity, Welfare and the Economical Houses Policy——A theoretical model for the economical houses

Furthermore, it will increase equilibrium price and quantity, and social welfare with increased consumer surplus and producer surplus.

Then, we develop an economic framework model to analyze the relationship between advertising and social welfare, and discuss the optimal advertising production level.