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创业风险投资是京津冀城市群一体化协同创新进程中的重要驱动力。本文利用社会网络分析方法分析了京津冀城市群创业风险投资的时空分布特征,在此基础上利用引力模型和计量分析模型揭示京津冀城市群创业风险投资时空分布的影响机制。主要结论为:京津冀城市群的创业风险投资网络在总额方面具有一定的周期波动性,其时空分布的不均衡性缓慢降低,创业风险投资的三中心(北京、天津和唐山)对周边城市具有一定的带动作用;创业风险投资在城市间的流动呈现出一定的网络性,但是发育缓慢,具有很强的向心性;创业风险投资对创业项目不同阶段的投资从偏重创业后期逐步趋向各阶段均衡发展;信息基础设施发展水平和经济发展水平与创业风险投资之间具有较强的正相关作用;金融环境、服务业发展水平相对滞后,对创新创业成果的转化和资金吸引能力较弱。
Venture capital investment is an important driving force in the process of synergistic innovation in the integration of Beijing, Tianjin and urban agglomerations. This paper analyzes the spatial and temporal distribution characteristics of venture capital investment in Beijing, Tianjin and Ji urban agglomerations by using social network analysis method. Based on this, it uses gravity model and econometric model to reveal the impact mechanism of spatial and temporal distribution of venture capital investment in Beijing, Tianjin and Ji urban agglomerations. The main conclusions are as follows: The venture capital investment network of Beijing-Tianjin-Hebei urban agglomeration has a certain degree of cyclical fluctuation in the total amount, and the imbalance of its spatial and temporal distribution is slowly reduced. The three centers of venture capital investment (Beijing, Tianjin and Tangshan) Has a certain role in promoting; venture capital investment in urban mobility showed a certain degree of network, but slow development, has a strong centrality; venture capital investment in different stages of venture capital projects tend to focus on the various stages of the late start Balanced development; the level of information infrastructure and economic development have a strong positive correlation with venture capital investment; the development level of the financial environment and service industry lags behind and their ability to transform innovation and entrepreneurship is weak.