This paper gives a clear explanation of the urban agglomeration,public transit,agglomeration economies,and basic theories,then makes a classification study on the foreign relevant empirical studies from the perspective of economic growth.Through literature review,it finds that empirical studies in regard to influence mechanism of public transit on agglomeration economies which promote the development of urban agglomerations mainly focus on three aspects:labor accumulation effect,industrial agglomeration effect and knowledge spillover effect.Studied the latest research development abroad and domestic research status in quo,it suggests the future research directions.%在阐释城市群、公共交通和集聚经济内涵以及相关理论的基础上,从经济增长角度对近年来国外相关实证研究进行梳理,发现公共交通主要通过劳动力集聚效应、产业集聚效应和知识溢出效应三个路径影响城市群集聚经济,并进而推动城市群发展.最后,结合该领域国外当前研究进展和国内研究现状,指出未来研究方向.
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