1 Energy need is a derived demand, and originates directly or indirectly from the development of economy. Energy need depends on the function of energy, i. e. the economic benefits from energy.

2 Derived demand: It can be defined as that the demand for business goods is ultimately derived from the demand for consumer goods.

3 The demand for a factor of production is a derived demand.

4 The demand for factors, such as labor, is a derived demand that comes from firms that use the factors to produce goods and services.

5 Based on such win-win concept, the concept of Game Theory is adopted to obtain optimal prices of different clusters from the derived demand curves by using data mining techniques.