Patent citations reexamined
研究发现近年专利引用性质剧变：少数申请产生多数引用，且引用与被引专利的技术相似度大幅下降。通过复刻经典研究，揭示对专利引用性质的普遍假设已误导该领域。
Abstract Many studies rely on patent citations to measure intellectual heritage and impact. In this article, we show that the nature of patent citations has changed dramatically in recent years. Today, a small minority of patent applications are generating a large majority of patent citations, and the mean technological similarity between citing and cited patents has fallen considerably. We replicate several well‐known studies in industrial organization and innovation economics and demonstrate how generalized assumptions about the nature of patent citations have misled the field.