Buying Can Reduce Giving | Psychology Today

Buying Can Reduce Giving | Psychology Today: "On some days, people walking across campus were givent he chance to donate to the American Cancer Society.  On other days, participants were given the chance to purchase a can of Red Bull for $2.50, and they were told that $0.50 would be given to the charity.  They were also allowed to donate additional money.  When only a donation was requested, about 80% of the participants gave money, but when there was a chance to purchase a drink, only about 20% of people gave money.  Even when including the amount of money that would be raised from the sales of the Red Bull, the charity got more money overall when there was no product for sale."