This paper aims to show the impact of technological intensity (R&D intensity) on trade. Using a detailed product-level dataset of 118 countries from 1988 to 2006 and the Poisson pseudo-maximum-likelihood (PPML) estimator, this paper provides robust evidence that technological intensity promotes exports mainly through increasing the variety of exports. More specifically, a 1-percentage point increase in the country’s technological intensity promotes the variety of exported products by around 0.12% on average across all 15 sectors. In addition, total exports and the variety of exported products increase are higher in technology-intensive sectors.

中文翻译：

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技术强度对国际贸易的影响

本文旨在展示技术强度（研发强度）对贸易的影响。本文利用 1988 年至 2006 年 118 个国家的详细产品级数据集和泊松伪最大似然（PPML）估计器，提供了强有力的证据，证明技术强度主要通过增加出口品种来促进出口。更具体地说，国家技术强度每提高1个百分点，所有15个行业的出口产品种类平均就会增加0.12%左右。此外，技术密集型行业的出口总量和出口产品品种增幅较高。