中文摘要：

新世纪以来，经济全球化与科学技术并重发展，企业越来越热衷于投身全球市场并且进行相应研发投入保持自身短期经营与长期发展，而目前的研究中很少涉及企业研发对其出口的影响．从企业生产率角度提出数理模型分析研发对企业出口的可能影响，研究认为研发带来生产率的提高而保证企业在出口市场具有更大能力获得利润，从而促进企业出口．通过2005--2007年中国制造业企业样本数据经验研究也证实了理论研究所得出的结论，即研发能够提高企业出口概率以及出口总量，并且研发对于企业生产率也有预期中的促进作用，从而生产率是企业研发对出口贸易的影响机制．

英文摘要：

Since the new century, with the development of both economic globalization and science and technology, en- terprises are increasingly keen on joining in the global market and investing in R＆D to maintain their short-term busi- ness and long-term development. However, the current studies that have been made are rarely involved in the effect of enterprises＇ R＆D on their exports. Using a mathematical model, it analyzes the effect of R＆D on enterprise＇s exports from the perspective of productivity. It finds out that R＆D improves productivity to ensure that export enterprise has a greater ability to make profit, which contributes to the enterprise＇s exports. With the data of Chinese manufacturing en- terprises from 2005 to 2007, it makes an empirical analysis which confirmed the conclusions of the theoretical study, that R＆D can improve export probability and total export of enterprises, and that R＆D can improve productivity of en- terprises. Thus, productivity is the influence mechanism of R＆D on the export trade.