Is financial knowledge change necessary for lasting savings behavior change? Or, akin to the canonical Friedman billiards player, can behavior persist “as if” such knowledge is held? We randomize 240 Ugandan young-adult clubs to financial education, savings account access, both, or neither....

We partnered with a large online auction website to test differing messages' effects on the decision to donate to charity at checkout. Our setting, where impulsive decisions are likely to be driving donations, allows us to evaluate intuitive responses to messages prompting a donation. We find...