空间外部性、技术依存与经济增长——基于1995—2015年中部6省409县的实证分析

Spatial Externalities,Technology Dependence and Economic Growth——An Empirical Analysis of 409 Counties of the Six Central Provinces,1995—2015

在经典MRW模型基础上,将人力资本引入总体生产函数中,通过构建一个包含稳态收入水平和条件收敛的参数异质性方程,利用1995—2015年中部六省409个县的样本和空间权重矩阵,使用最近开发的空间计量经济学技术,着重考察了稳态各县物质资本和人力资本外部性、技术扩散对经济增长的影响。结果发现:各县技术存量的外部性不仅具有跨县域边界特性,其外溢性的强度与县域之间纯粹的地理距离相关;人力资本对提升技术水平有显著作用,在各县经济增长中具有可靠的外溢效应。

Based on the framework of MRW models,this paper introduces human capital into the overall production function. After presenting the database of 409 counties from 1995 to 2015 and the spatial weight matrix which is used to model the spatial connections between all the counties in the sample,this paper builds a parameter heterogeneity equation that includes the steady income level and conditional convergence,then it focuses on studies of the influence on economic growth inserted by steady physical capital,human capital and technical diffusion by using recently developed technique of spatial econometrics. It is found that the stock of technology in one county produces externalities that may cross county borders and spill over into other counties with an intensity which decreases with distance. With its notable impact on economic growth,human capital has credible spillover effect in all the counties.