Does salient information on social media influence individuals’ economic decisions and beliefs? Using aggregated data from Facebook and a difference-in-differences strategy, I show that individuals who are socially connected to someone affected by Hurricane Harvey are more likely to purchase flood insurance policies after the event. This effect is stronger in areas at higher risk of flooding. Being socially connected to someone affected by Hurricane Harvey also influences individuals’ perceptions of global warming.

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泛滥的社会联系

社交媒体上的重要信息会影响个人的经济决策和信仰吗？使用来自 Facebook 的汇总数据和差异差异策略，我表明与受飓风哈维影响的人有社会联系的个人更有可能在事件发生后购买洪水保险单。这种影响在洪水风险较高的地区更为明显。与受飓风哈维影响的人建立社会联系也会影响个人对全球变暖的看法。