% pubman genre = article @article{item_2483676, title = {{When to diversify, and with whom? Choosing partners among out-group strangers in lowland Bolivia}}, author = {Pisor, Anne C. and Gurven, Michael}, language = {eng}, issn = {1090-5138}, doi = {10.1016/j.evolhumbehav.2017.09.003}, publisher = {Elsevier}, address = {New York, NY}, year = {2018}, date = {2018-01}, abstract = {{Evidence from the ethnographic and archaeological records reveals that humans often rely on out-group relationships for access to non-local resources and resource buffering. However, little is known about how actors choose out-group cooperative partners. The existing literature suggests that (in-group) partner choice is based on characteristics associated with greater cooperation (e.g., trustworthiness and productivity). Is out-group partner choice based on the same criteria as in-group? Because out-groups may be unique sources of resource access, we suggest that out-group partner choice should track characteristics of both the candidate partner and the partner{\textquotesingle}s group that are associated with benefits for the actor. To assess partner choice, we employed a non-anonymous, one-shot economic game where participants could allocate money towards in-group and out-group strangers. Participants were from three populations of Bolivian horticulturalists (n {\textequals} 200) that range in their market integration and their mobility, thus capturing variation in potential benefits to out-group cooperation. We find that individual-level qualities of prospective partners, such as wealth and trustworthiness, affect allocation behavior differently for in-group vs out-group prospective partners. While we find no consistent effects of perceived group qualities on a donor{\textquotesingle}s giving to in-group and out-group members, the relevance of out-group market resource access for Tsimane{\textquotesingle} donors{\textquotesingle} allocations suggests that, at least when it comes to dividing a limited resource, qualities associated with a group can affect partner preference. Taken together, results provide insight into patterns of intergroup relationship building that have been crucial in the human lineage.}}, journal = {{Evolution and Human Behavior}}, volume = {39}, number = {1}, pages = {30--39}, }