| Non-state economy plays an important part in China's economic practice, and it is an important force in supporting China's rapid economic growth. The non-state economy and China's market-oriented reforms are mutually promoted. Without the growth of non-state economy, it is impossible to establish China's true socialist market economic system; Without the market-oriented economic system, the non-state economy can't survive in the real soil either. In the reforms of the market-oriented economic system, with the reform and arrangement of the economic sector within the system, we acquiesce in non-state economy and make it gestate and develop outside the system. And then we make it go into the system through the free flowing and pooling of market economic resources with the advance of reforms. From the process of non-state economy's development, the non-state economy first appears in rural and the region where public ownership is relatively weak. As for the reasons, besides these areas'being in the margin of the system and are relatively weak controlled by system or public power, the informal institutional factors are also affecting the development of non-state economy. With the implementation of a series of policies which encourage non-public economy and non-state economy, the institutional environment for non-state economy has improved. However, investigations reveal that the developmental conditions and living state are still not optimistic. Apart from the defects of formal institution, informal institution is also an important factor which can't be ignored.New institutional economics is a classic tool to research the non-state economy for researchers. On the basis of predecessors, the writer tries to take the non-state economy which has developed since the foundation of the PRC as a research object, researching and analyzing the non-state economy from informal institution. We believe that taking the Marxist economics as a guide, basing on the theory of institutional change, and using the method of new institutional economics and sociology will have theoretical and practical significance for the exploration of socialist market economy's law and have guidance and interpretation for the developmental issues of non-state economy.Followed by five parts, the article is stated like this: The first part--preamble is on the origin and proposal of the topic. Leaded by two questions: in the area where the public power is weak, whether any other factors function and with the implementation of promoting policies, why the developmental conditions are still not optimistic, the background and meaning appears, and we also talk about the researching method, the innovation, ideas and structure; The second part, the theoretical basis, that is related to the three core concepts of the full text: the meaning and interpretation of non-state economy, institution, informal institution as well as relevant theories. This is good for the understanding of relevant concepts and getting ready for the learning of further relations between non-state economy and informal institution and the impact of the latter on the former; The third part is the core of the paper. From three aspects: the vertical development, horizontal east-west comparison and non-state economy's micro-enterprises, we analyze non-state economy from informal institutional factors in depth, especially explain the most prominent informal institutional factors from different perspectives; Part IV, aiming at the impact of informal institution on the non-state economic development, especially its informal institutional barriers, we seek an answer and promote institutional innovation on informal institution and found an environment where formal institution and informal institution are integrated. This will promote the healthy development of non-state economy; Part V, the conclusion, to sum up the basic viewpoints. With the establishing and polishing of socialist market economic system, the informal institution's path-dependence and delay of time with the related arrangements of formal institution, they work together to achieve such an outcome -- the non-state economy achieves regime change, goes into the system and develops. |