CAJ | 학술논문

进入知识经济时代，科学技术成为重要的生产要素，而科技创新活动中最重要的是R＆D活动。本文试图从生产过程技术关系的角度，实证地研究目前我国企业R＆D活动的投入产出效应。首先我们在生产函数的投入要素向量中引入R＆D投入变量，然后结合相关的研究经验和本文的研究目的，选择二级CES生产函数模型，并对这类模型的参数估计方法进行了探讨。在此基础上，采用2003年上海主要制造业企业的横截面数据，实证研究了企业R＆D投入的产出效应，以及投入要素之间的替代关系，得到了一些具有启发性的结果。
진입지식경제시대，과학기술성위중요적생산요소，이과기창신활동중최중요적시R＆D활동。본문시도종생산과정기술관계적각도，실증지연구목전아국기업R＆D활동적투입산출효응。수선아문재생산함수적투입요소향량중인입R＆D투입변량，연후결합상관적연구경험화본문적연구목적，선택이급CES생산함수모형，병대저류모형적삼수고계방법진행료탐토。재차기출상，채용2003년상해주요제조업기업적횡절면수거，실증연구료기업R＆D투입적산출효응，이급투입요소지간적체대관계，득도료일사구유계발성적결과。
This paper presents an empirical research on input-output effect of R＆D in China＇s manufacturing firms, on the vien of technical relationship in the production process. First of all, we introduce the R＆D input variable into input vector of production function; then we construct a two-level CES production function model and make a comparative analysis of the estimation methods; thus, we employ the firm-level cross-section data of Shanghai＇s main manufacturing industries in 2003 and study empirically the input-output effect of R＆D as well as the substitution relationship among input factors. The results of a series of ridge regression models constitute the core of the paper, based on which we come to some instructive conclusions.