Effective demand theory is the basis of Keynesian economic theory, the theory of state intervention is the core content of his economic theory.

凯恩斯经济理论的基础是有效需求理论，国家干预理论是其经济理论最核心的内容。

Finally comes part three. On one hand, it explains the theoretic value of the human demand theory;

一方面，“人的需要”理论的理论价值；

This corresponds to the basic assumption of demand theory that consumers attempt to maximize utility .

这就相当于需求理论中的基本假设是消费者企图功能最大化。

The discussion indicates that there is a fatal deficiency in the present institution demand theory, and that contract evolution theory forms an alternative.

分析表明，在制度演进问题上，既有的制度需求框架存在着重大的缺陷，契约演进论则可以作为一种替代性的选择。

The second part:discussing the educational supply-demand theory, as the theoretical basis of the research.

第二部分：阐述理论基础——教育供需理论。

Based on the computational economy-based model, a distributed resource scheduling system for grid environment was proposed using supply and demand theory.

在基于计算市场模型的网格环境下，利用供求规律，设计并仿真了一种分布式网格资源调度系统。