The charity tax
The estimated social pressure cost of saying no to a solicitor is $3.5 for an in-state charity and $1.4 for an out-of-state charity. Our welfare calculations suggest that our door-to-door fund-raising campaigns on average lower utility of the potential donors.
That's from Stefano DellaVigna, John List, and Ulrike Malmendier. You'll find an ungated copy here.