Western economics takes market externality as an important field of study and regards it as one of the basic phenomena of market defect.

The paper makes a systematic analysis of the phenomena and causes of market defect and government ineffectiveness,and put forward an ideal method to solve the two problems.

The market defect does exist in the operational process.

This paper analyzes government failure from a practical angle: on one hand, market failure demands government s interference, because of many reasons, market defects have been exaggerated, which leads to too much interference from the government; on the o.

This article analyses the non-market limitation according to China present condition and makes us clear the main characteristic of non-market limitation and puts forward the present choice of government in economy,politics and system.

Since "Tendering" came into effect,the construction market establishes a legal person responsibility system,the bidding system,project supervision and contract management system as the core of the project management system,to provide market conditions and legal protection for "the lowest bid" method.

Through quantity analyzing the relationship of the profits of the M&As and the market parameters,it got the conclusion that the promoting market conditions include: more trademarks of the mergers,less trademarks of the other companies,weakly pricing power of the domestic companies,low extent of differ.

My article means to make some brief analysis about economic situation and market condition.

How to make a good engineering quality supervision under the condition of limited manpower and material resources has been explored in the light of market condition, onsite condition, and the staff condition based on the engineering quality supervision experience of Yangzi-BASF integrated project.