Newman, George E.; Jeremy Shen, Y. - In: Journal of Economic Psychology 33 (2012) 5, pp. 973-983
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 gifts types, regardless of whether the donations were hypothetical … or real, the gift was desirable or undesirable, the charity was familiar or unfamiliar, or the gift was more or less …