中文摘要：

社会关系网络是市场机制之外另一种影响经济行为和绩效的非正式社会制度。构建社会关系网络的多维测量体系，利用基于收入决定方程的夏普利值分解方法和中国农户微观数据（2008）对不同市场化水平区域社会关系网络如何影响农户收入差距进行比较分析，考察社会关系网络对农户收入差距的地区差异。研究结果表明，社会关系网络对农户收入差距扩大具有正向影响，农户所拥有的社会关系网络差异对收入差距的影响在市场化程度较高的东部地区更高。社会关系网络并非普遍认为的有助于减小农户收入差距，而是对扩大收入差距起到关键作用。

英文摘要：

Social network is another informal social system to influence economic behavior and performance in addition to market mechanism. Based on Shapley Value Decomposition method and the microscopic data of Chinese rural households in 2008, the author constructs a multi-dimension measurement system of social network to compare how social networks in different regions with dif- ferent marketization levels influence the income gap of rural households. Results show that social network has positive influence on income gap expansion of rural households, and the influence of social network differences of the households is ~greater in eastern China with higher level of mar- ketization. Social network plays the key role in expanding income gap instead of what we generally known of reducing the income gap of rural households.