A new study, co-authored by Health & Behavioral Sciences and Anthropology Professor David P. Tracer, shows that while evolutionary and other economic theories expect humans, like other animals, to behave selfishly to maximize material gains, human cooperation occurs when reputation is at stake. The study, published in the journal Nature Communications, was co-authored by Gianluca Grimalda and Andreas Pondorfer of the Kiel Institute for the World Economy, Germany. You can read more about it here.