Six experiments examined the effects of thank-you gifts on charitable giving. Results indicate that although people expect that the offer of thank-you gifts will increase donations, such offers actually reduce charitable donations. This effect was obtained across a wide variety of charities and...

Why do people purchase objects that were once owned by celebrities, such as film stars or politicians, and also by despised individuals, such as serial killers and notorious dictators? The present studies examine three potential explanations: mere associations, market demands, and contagion (the...