ABSTRACT This paper empirically investigates whether the productivity of a public (government-funded) R&D project improves when the aggregate R&D investment in the same technology field increases. Based on the unique project level data that cover almost entire public R&D projects in Korea, this paper shows that aggregate investment in other public R&D projects in the same technology field increases a public R&D project’s outputs both independent of its project expenditure (additive spillover effects) and interactive with its project expenditure (multiplicative spillover effects). The spillover effects from the aggregate private R&D investment in the same technology field also exist, but to a much lesser extent.

中文翻译：

---

公共研发生产力的研发溢出效应

摘要 本文实证研究了当同一技术领域的研发总投资增加时，公共（政府资助）研发项目的生产力是否会提高。基于涵盖韩国几乎所有公共研发项目的独特项目级数据，本文表明，对同一技术领域的其他公共研发项目的总投资增加了公共研发项目的产出，且与项目支出无关（附加溢出效应）并与其项目支出互动（乘法溢出效应）。同一技术领域的私人研发总投资也存在溢出效应，但程度要小得多。