董晓芳, 袁燕
#002182 20131014 (published)
企业的创新会受到其所处生命周期阶段及所在城市中其它企业在地理上集聚而产生的外部经济的影响。本文运用2007年中国规模以上工业企业数据进行实证研究,发现企业的创新在生命周期不同阶段会受益于不同的聚集经济:新生或年轻企业的创新更多地受益于产业多样化带来的雅各布外部经济,成熟企业的创新则更多地受益于产业专业化带来的马歇尔外部经济。本文为文献中关于马歇尔外部性还是雅各布外部性更促进企业创新争论提供了新的经验检验证据,且为Duranton 和 Puga(2001)的理论模型提供了实证验证。 Firms’ innovation will be affected by its age and the cluster of other firms in the same geography unit. In this paper, we employ the micro-level Chinese manufacturing data to analyze the relationship of firms’ innovation and economies of agglomeration from the perspective of firm life cycle. The empirical results suggest that new or young firms are more likely to benefit from Jacobs externalities, and mature or old firms may benefit more from Marshall Externalities. We solve the long existing dispute on which externality improves firms’ innovation, and we are among the first few papers that provide empirical evidence for Duranton and Puga (2001) paper.
JEL-Codes: O31, R12
Keywords: 企业创新、雅各布外部经济、马歇尔外部经济、企业生命周期 Firm innovation, Jacobs externalities, Marshall externalities, Firm life cycle

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