According to the identifiability effect, people will donate more to a single beneficiary rather than to many beneficiaries, holding constant what the donations are actually used for. We test the identifiability effect for two novel subject pools (the suppliers and beneficiaries of volunteer...

Energy efficiency is an important economic and environmental concern, and likewise the correction of current wasteful energy practices. We document widespread “tire pressure neglect” – three-quarters of drivers waste gas driving on underinflated tires. Negative descriptive social norms are...