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Patents and RD: an econometric investigation using applications for German, European and US patents by German companies

机译:专利与研发:德国公司使用德国,欧洲和美国专利申请的计量经济学调查

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摘要

Based on the data of the first wave of the Mannheim Innovation panel, this paper explores the link between R&D expenditures and patents. Our data allow a detailed analysis of the firm size distribution of R&D and patent applications at different patent offices. It is shown that the share of R&D performing firms is strictly increasing with firm size. The share of firms applying for patents shows an even steeper increase with firm size. Moreover, large firms more likely apply for patents in more than one country. The home patent office seems to be especially important for small firms. Using various count data models, the paper explores the relationship between R&D and patents at the firm level. We carefully test several distributional assumptions for count data models. A negbin hurdle model seems to be the most appropriate count data model for our data as the decision to patent inventions and the productivity of R&D are ruled by different mechanisms. Our estimates point towards significant returns to scale of R&D. Furthermore, the empirical results can be interpreted towards minor and insignificant spillover effects. Even after controlling for a variety of firm characteristics, firm size exhibits a large effect on the propensity to patent.
机译:基于曼海姆创新小组第一波的数据,本文探讨了研发支出与专利之间的联系。我们的数据可以详细分析不同专利局的研发和专利申请的公司规模分布。研究表明,从事研发活动的公司所占份额随着公司规模的增加而严格增加。申请专利的公司所占比例显示,随着公司规模的增加甚至更大。而且,大公司更有可能在一个以上的国家申请专利。对于小型公司而言,家庭专利局似乎尤其重要。本文使用各种计数数据模型,探索了企业层面上研发与专利之间的关系。我们仔细测试了计数数据模型的几个分布假设。对于我们的数据而言,negbin障碍模型似乎是最合适的计数数据模型,因为专利发明的决定和研发的生产率由不同的机制决定。我们的估计指向研发规模可观的回报。此外,经验结果可以解释为较小和无关紧要的溢出效应。即使在控制了各种公司特征之后,公司规模对专利的倾向也显示出很大的影响。

著录项

  • 作者

    Licht Georg; Zoz Konrad;

  • 作者单位
  • 年度 1996
  • 总页数
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类

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