Using the standard team theory of Alchian & Demsetz\'s,this paper sets up the team theory model based on agents fairness preference and analyzes the mechanism of fairness preference effect on team cooperation and team efficiency considering budget balancing constraint and agents fairness preference.

Discrete network design problem with budget constraint;

In order to show that the decision-making characteristics of loss constraint models are different from the ones of budget constraint models, the solutions between those two .

Then,the mode of local government with independent e-conomic benefit is discussed,with hard budget constraint and inter-region competition added to highlight the ef-fect on the economic efficiency.

When lacking in relative information, enterprises are unable to enforce hard budget constraints and, under the soft budget constraints, the administrative personnel have faint motivation to set up and carry out regulations, which in turn results in some decision-makers resisting and even destroying the regulations with the desire of the rent seek of power.

In a sequential English auction,a seller with two objects faces a group of bidders who are subject to different budget constraints.