The result indicates that the contract electricity price must be the expected value of the spot electricity price under the mature power market.

In this paper,the status and function of contract price are discussed in coal corporation management,five management coterminous systems are set up include former signing,warrant,signing,performance,after performance etc about price formation,eight negotiation skills and scientific ways are put forward about the contract price formation in coal corporations.

This paper explains with example of cases the method and calculation procedures for the contract price adjustment of expressways under construction.

Actuality and exist problems of unit price contract marked price in road project;

The article introduce two methods to build contract network,parallel method and integral-partial method,analyzes their advantages and disadvantages,illustrates the type of contract and the management of unit price contract,and points out the importance of contract management on engineering management,which has significance to increase engineering quality.

This paper analyzes three common types of construction contracts based on the terms of payment,as the lump sum contract,unit price contract and cost reimbursable contract,and the risk allocation in terms of construction scope,quantity and unit price between the employer and the contractor.

Strategic behaviors of power suppliers in forward markets are derived from an equilibrium model of electricity markets with contracts for differences.