title: Perspectives from ethnography on weak and strong reciprocity.
abstract: To add ethnographic perspective to Guala's arguments, I suggest reasons why experimental and ethnographic evidence do not concur and highlight some difficulties in measuring whether positive and negative reciprocity are indeed costly. I suggest that institutions to reduce the costs of maintaining cooperation are not limited to complex societies.
authors.affiliation: Department of Anthropology, University of Utah, Salt Lake City, UT 84108, USA. wiessner@soft-link.com
authors.forename: Polly
authors.initials: P
authors.lastname: Wiessner
mesh_terms: D003299:Cooperative Behavior; D005716:Game Theory; D006801:Humans; D008960:Models, Psychological; D011678:Punishment / Q000523:psychology*; D012919:Social Behavior