Alpízar, Francisco and Peter Martinsson. 2012. “Paying the price of sweetening your donation: Evidence from a natural field experiment.” Economics Letters 114: 182-185.
Download reference Doi:10.1016/j.econlet.2011.10.008
We add a gift in appreciation of the subject’s contribution to a social reference treatment successfully proven to trigger higher donations, and find that the share of people contributing decreases significantly, thereby eroding the original treatment’s capacity to increase donations.