TY - RPRT A1 - Chao, L.-W. A1 - Kohler, H.P. T1 - The Behavioral Economics of Altruism, Reciprocity, and Transfers within Families and Rural Communities: Evidence from Sub-Saharan Africa Y1 - 2007 UR - http://repository.upenn.edu/parc_working_papers/9/ ER -