摘要
本文我们沿用Hausman,Hall和Griliches(1984)对专利产出与R&D支出之间关系的分析框架,结合上海市大中型工业行业专利产出数据本身的特点,运用了较为适当的计量经济学分析技术———零膨胀泊松回归方法,对上海市大中型工业行业专利产出的滞后机制进行了研究。我们发现了两个有意义的结论:第一,对于上海市大中型工业企业来说,其科技活动的内部支出与专利产出的滞后机制表现为一个2～6期的滞后结构。同时这一结构还有一个不对称的倒U形内部特征,具体表现为上海市大中型工业企业科技活动经费的内部支出对专利产出贡献的滞后作用表现为先增后减,且增快减慢;第二,在这个滞后结构中,存在着一个对专利产出贡献作用最大的科技活动经费内部支出时刻,这个时刻大约出现在专利产出之前第4期的科技活动经费内部支出。
This paper is an empirical research of lag structure between patent and R＆D. According to the formula brought forward by Hausman, Hall and Griliches （1984） and the character of data, we study the lag structure by zero inflated Poisson distribution model based on a panel consisting of 32 industrial sectors for the period 1993-2003 in Shanghai. The general finding includes two points. First, for industrial sectors in Shanghai, a 2 to 6 lag R＆D has a significant impact on patent output. The impact behaves an inversed “U” character （rise at beginning, then move down）, but the speed is different, that at beginning is higher. Second, there is the biggest impact ooint in the lag structure, which is at about period 4.
出处
《数量经济技术经济研究》
CSSCI
北大核心
2005年第9期136-142,共7页
Journal of Quantitative & Technological Economics
