Political polarization and cooperation during a pandemic
研究政治极化如何影响个人参与COVID-19预防行为，发现当州长来自对立党派时，个人预防行为减少，尤其在极化州的中等选民中效应显著，并估计该效应使病例增加约1%。
In this paper, we examine the relationship between political polarization and individuals' willingness to contribute to the public good by engaging in preventative behaviors against COVID-19. Using a sample of individuals from close-election states, we first show that individuals engage in fewer preventative behaviors when the governor of their state is from the opposite party. We also show that this effect is concentrated among moderate individuals who live in polarized states, and that it is strongest when the state has been relatively forceful in combating COVID-19. We estimate that the opposite-party effect increased COVID-19 cases by around 1%.