公共R&D投资在制造业部门生产率差异——部门技术水平重新划分的视角

Productivity differences of public R&D investment on China's manufacturing sectors——a perspective of sector technology reclassification

基于部门技术水平重新划分的视角,运用1996–2009年间中国两位数行业代码分类的20个制造业部门的面板数据,实证分析了公共R&D在制造业部门间的生产率差异。在测算公共R&D总体弹性及其在高技术部门、非高技术部门生产率弹性基础上,研究发现:样本期内公共R&D资本对制造业部门生产率有显著促进作用,公共R&D效果具有部门偏向性,公共研发资本在高技术行业的生产率弹性远高于非高技术行业,高技术产业生产率的提高主要依赖于R&D活动,而中低技术产业的生产率提高更多依赖于物质资本的积累。

Based on a perspective of sector technology reclassification, the paper investigates the effects of public R＆D investment in productivity of twenty two - digit China＇ s manufacturing sectors panel data during 1996 -2009. Through calculating the productivity e- lasticity,the results suggest that there are significant productive effects during the sample period, a sector bias exists that public R＆D has a greater effect on productivities of High - tech sectors than medium or low - tech sectors. Productivity increase in High - tech sec- tors mainly sources from R＆D activities, while that of medium or low - tech sector mainly depends on material capital accumulation.