000			00477pab a2200169 454500
008			180718b2018 xxu||||| |||| 00| 0 eng d
100			_aSimpson, Brent et al
245			_aThe roots of reciprocity: gratitude and reputation in generalized exchange systems
260			_c2018
300			_ap.88-110.
362			_aFeb
650			_aGeneralized exchange system
650			_aAltruism
650			_aCooperation
773			_aAmerican Sociological Review
909			_a116951
999			_c116945 _d116945