中文摘要：

方言作为地域文化的载体,是影响经济绩效的重要因素之一。现有研究虽然揭示了方言的经济后果,但对其产生影响的机制却语焉不详。文章基于中国综合社会调查数据库,将社会信任作为理解方言影响经济绩效的渠道,考察了方言对社会信任的影响。研究发现：（1）在陌生人之间,使用同一种方言有利于建立信任,即方言会影响社会信任的形成;（2）方言之所以能够影响社会信任,是因为它作为个体来源地的符号,能够增进彼此的身份认同感;（3）方言对社会信任的影响具有异质性,不仅会因个体受教育程度、城市发展水平和城市人口结构的差异而有所不同,也会因地区差别而有所差异。文章从社会信任的视角为方言影响经济绩效背后的机制提供了一个微观解释。

英文摘要：

As one of important carriers of regional culture,dialect is an important factor affecting economic performance;however,existing research reveals the economic consequences of dialect as a cultural form,but does not elaborate how dialect affects the economy.This paper takes social trust as a channel of understanding the effect of dialect on economic performance,and investigates empirically the impact of dialect on social trust based on China comprehensive social survey database.It comes to the following conclusions：firstly,among strangers,the use of the same dialect is beneficial to the construction of trust,namely dialect can affect the formation of social trust;secondly,dialect can affect social trust because it can be used as identification symbols of people＇s place of origin,thereby enhancing each other＇s sense of identity;thirdly,the effect of dialect on social trust has the heterogeneity,and it differs somewhat with not only individual education,urban development and urban population structure but also regions.This paper provides a micro explanation of the effect of dialect on economic performance from a perspective of social trust.