中文摘要：

本文从比较制度分析的视角来研究非正式制度在东北地区经济转轨中的作用。首先考察和总结了东北地区和长三角地区非正式制度的稳定特点、成因及对其主体经济行为的影响，然后将两地区行为倾向简化设定后，通过学习竞争模型，以行为偏好对交易倾向和交易、分工与市场规模的相互依赖性为切入点，进而比较不同行为倾向对经济演化的影响，最终试图对东北地区经济转轨中非正式制度的约束作用做出解释。

英文摘要：

From the perspective of system analysis, the paper undertook to study the function of intormal system during the transformation of northeast area. At the beginning, it investigated and summarized the characteristics, causes of informal system between northeastern area and the Yangtse River delta, analyzed their influence upon behavior of major economy. And then it predigested the behaviors of the two areas, through learningcompetitive model, compared the impact of different behavior proneness upon economic evolution. At last, the paper attempted to explain the restriction role of informal system in the transformation of northeast area.