Behavioral types and evolution of institutions Kimmo Eriksson *† and Pontus Strimling † Classification: SOCIAL SCIENCES/Social sciences Corresponding author: Kimmo Eriksson, M¨ alardalen University, School of Education, Culture and Communication, SE-72123 V¨ aster˚ as, Sweden, +46 703 767 451, fax: +4621101330, e-mail kimmo.eriksson@mdh.se Manuscript information: ?? text pages (including title page, abstract, references and figure legends), ?? figures, ?? tables, and Supplementary Information. * M¨ alardalen University, School of Education, Culture and Communication, V¨ aster˚ as, Sweden, and † Stockholm University, Centre for the Study of Cultural Evolution, Stockholm, Sweden Submitted to Proceedings of the National Academy of Sciences of the United States of America www.pnas.org/cgi/doi/10.1073/pnas.0709640104 PNAS Issue Date Volume Issue Number 1–6