中文摘要：

以71家制造业企业为研究样本，对公司R＆D投入和绩效的关系进行了实证分析。研究结果表明，我国制造业上市公司的平均研发投入强度达到了国际上公认的维持生存的水平（2％），但分布不均，低投入状况与高投入状况并存；制造业上市公司的研发投入和公司业绩显著相关，但并没表现出研发投入的时间滞后性．研发投入和投入后1-4年的业绩相关性逐渐降低，公司业绩和当年及前两年的研发投入的相关性逐渐降低。

英文摘要：

Based on 71 manufacturing firms＇ data, the paper investigates the relationship between R＆D expenditures and firm performance. Our results indicate that the average R＆D expenditure intensity of manufacturing firms in China achieves survival level（2%）, but the distribution is not uniformity that low expenditure coexists with high expenditure. Our results also suggest that R＆D expenditure with firm performance as measured by return on sales （ROS） presents significantly positive correlation, but it does not present time lag characteristic.