Defaults and Donations: Evidence from a Field Experiment
通过在线募捐平台的实地实验，研究默认选项对慈善捐赠和平台支持捐款的影响，发现默认选项显著影响个人行为但不改变总捐赠额，而平台支持捐款随默认金额增加。
Abstract We study the effects of defaults on charitable giving in a large-scale field experiment on an online fundraising platform. We exogenously vary default options along two choice dimensions: the charitable donation decision and the “co-donation” decision regarding how much to contribute to supporting the platform. We document a strong effect of defaults on individual behavior but nevertheless find that aggregate donation levels are unaffected by defaults. In contrast, co-donations increase in the default amount. We complement our experimental results with a structural model that investigates whether personalizing defaults based on individuals' donation histories can increase donation revenues.