TY - JOUR EP - 134 JF - Journal of Public Economics AV - public ID - discovery10068574 SN - 0047-2727 N1 - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions. A1 - Adena, M A1 - Huck, S VL - 172 Y1 - 2019/04// N2 - We study intertemporal crowding between two fundraising campaigns for the same charitable organization by manipulating donors? beliefs about the likelihood of future campaigns in two subsequent field experiments. The data shows that initial giving is decreasing in the likelihood of a future campaign while subsequent giving increases in initial giving. While this refutes the predictions of a simple expected utility model, the pattern is in line with a model that allows for (anticipated or unanticipated) habit formation provided that donations in the two periods are substitutes. TI - Giving once, giving twice: A two-period field experiment on intertemporal crowding in charitable giving KW - charitable giving KW - field experiments KW - intertemporal crowding SP - 127 UR - http://doi.org/10.1016/j.jpubeco.2019.01.002 ER -