文章基于演化经济地理学理论，运用熵指数探讨了城市产业多样化和专业化对城市经济的影响，并根据2003－2010年中国279个地级及以上城市的产业统计数据实证研究了集聚经济、城市产业相关性多样化和无关性多样化对城市经济增长的影响。研究结果表明：（1）整体而言，城市产业集聚的多样化和专业化都能促进城市经济增长，但是多样化的作用显著大于专业化的作用；（2）并非所有的多样化都能显著促进地区经济增长，以知识溢出为主要影响机制的相关性多样化能显著促进经济增长，而以组合效应为主的无关性多样化不能或尚未促进经济增长。这表明我国城市经济发展受益于具有相关性或互补性的多样化部门和专业化部门所带来的知识溢出。文章验证了我国城市经济中既相关联又具差异化的知识溢出对城市经济增长的重要作用。%Based on evolution economic geography theory ,this paper employs entropy index to discuss the effects of urban industry variety & professionalization on urban econo‐mies ,and uses the industrial statistics of 279 cities at prefecture level or above from 2003 to 2010 to empirically study the effects of agglomeration economy ,correlation variety and independence diversification of urban industries on urban economic grow th .It arrives at the following conclusions :firstly ,as a w hole ,the variety and professionalization of urban in‐dustry agglomeration both can promote urban economic grow th ,but the role of variety is significantly bigger than the role of professionalization ;secondly ,not all variety signifi‐cantly promotes regional economic growth ;and correlation variety taking knowledge spill‐overs as the main influencing mechanism can significantly promote economic grow th ,but dependence variety taking combination effect as the main influencing mechanism cannot promote or has not yet promoted economic grow th .It show s that urban economic develop‐ment in China benefits from knowledge spillovers resulting from diversification and profes‐sionalization sectors with correlation or complementarity .It confirms the important role of correlated but diversified knowledge spillovers in China’s urban economy in urban econom‐ic grow th .
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