Political Sentiment and Innovation: Evidence from Patenters
研究发现美国发明家的政治情绪影响其专利申请行为：民主党发明家在奥巴马当选后更可能申请专利，特朗普当选后则相反，且效应在政治活跃者中更强，党派倾向也导致技术领域专利分布变化。
Abstract We document political sentiment effects on U.S. inventors. Democratic inventors are more likely to patent (relative to Republicans) after the 2008 election of Obama but less likely after the 2016 election of Trump. These effects are at least twice as strong among politically active Democrats and are present even within firms and within firm$ \times $technology. We also show that partisans tend to cluster in technologies (e.g., Democrats in Biotechnology and Republicans in Weapons), so that sentiment effects aggregate to more patents in the technologies dominated by the winning party.