中文摘要：

基于世界银行对中国企业投资环境的调查数据,使用Lowess修匀的非参数回归方法,实证分析了企业规模与R＆D投入之间的关系。结果表明小企业盈利能力的稳定性较低,抑制了其R＆D投入的频度,使企业R＆D投入强度与企业规模之间呈现正相关关系;就存在R＆D投资的企业而言,小企业R＆D投入强度并不低,R＆D投入强度与企业规模之间呈现倾斜的＂V＂型结构变化。

英文摘要：

Using the survey data of World Bank＇ s China business investment climate, the paper investigates the relationship of firm size and R＆D investment by the Lowess nonparametric regression. The result shows that the lower stability of small - firms profitability inhibits the frequency of their R＆D investment, so that there is a positive correlation between R＆D investment intensity and the firm size in terms of all firms data. But the intensity of small - firms R＆D investment is not less than that of large - firm, so there is a tilt ＂V＂ -shaped circle between R＆D investment intensity and the firm size, when the data is exclusive of firms which have not doing R＆D investment.