People more likely to return lost wallets if there's cash inside

You might think that when someone finds a wallet on the street, they're less likely to return it if there's cash inside. But you'd be wrong. According to a new three-year study across multiple countries, people are more inclined to return wallets stuffed with money. The more cash, the more likely they'll turn it over to the rightful owner. From the New York Times:

The evidence suggests that people tend to care about the welfare of others and they have an aversion to seeing themselves as a thief, said Alain Cohn, a study author and assistant professor of information at the University of Michigan. People given wallets with more money have more to gain from dishonesty, but that also increases the psychological cost of the dishonest act...."

Christian Znd, a doctoral student and co-author, said a survey they conducted found that without money, not reporting a wallet doesnt feel like stealing. With money, however, it suddenly feels like stealing and it feels even more like stealing when the money in the wallet increases...."

The researchers surveyed people to see if they expected bigger rewards for returning more money; they didnt.