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Determinants of patent quality in U.S. manufacturing: technological diversity, appropriability, and firm size

机译:美国制造业专利质量的决定因素:技术多样性,专有性和公司规模

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摘要

We study the determinants of patent quality for a panel of U.S. manufacturing firms, focusing mainly on the effects of firm-level technological diversity and appropriability conditions. Technological diversity increases the quality-adjusted patent count on most of the diversity distribution, but its relationship with average patent quality is an inverted-U. We find that appropriability conditions (proxied by the rate of self-citations at the firm level) have similar, non-linear effects on both the average quality of patents, and quality-adjusted patents per R&D, which is consistent with an inverted-U pattern. Firm size has no effect on the average quality of patented innovation at the firm level. Finally, as R&D intensity increases, the rate of corporate innovation falls, but its average quality increases, indicating a quality–quantity trade-off in R&D.
机译:我们研究了一组美国制造公司的专利质量的决定因素,主要侧重于公司层面的技术多样性和专有性条件的影响。技术多样性增加了大多数多样性分布上经过质量调整的专利数量,但其与平均专利质量的关系是倒U型。我们发现,可分配性条件(由公司一级的自我引用率所替代)对平均专利质量和每次研发的质量调整专利均具有相似的非线性影响,这与倒置U形一致图案。公司规模对公司层面专利创新的平均质量没有影响。最后,随着研发强度的提高,企业创新的速度下降,但是其平均质量却提高了,这表明研发质量与质量之间的权衡。

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