Template-Type: ReDIF-Paper 1.0 Author-Name: Åshild A. Johnsen Author-Name-First: Åshild Author-Name-Last: A. Johnsen Author-Workplace-Name: Oslo and Akershus University College - Oslo Business School Author-Name: Henning Finseraas Author-Name-First: Henning Author-Name-Last: Finseraas Author-Workplace-Name: Norwegian University of Science and Technology (NTNU) Author-Name: Torbjørn Hanson Author-Name-First: Torbjørn Author-Name-Last: Hanson Author-Workplace-Name: FFI Kjeller Author-Name: Andreas Kotsadam Author-Name-First: Andreas Author-Name-Last: Kotsadam Author-Workplace-Name: University of Oslo - Ragnar Frisch Centre for Economic Research Title: The Formation of Competitive Preferences Abstract: Men are more competitive than women, but we do not know how stable competitive preferences are. We conduct a pre-registered data collection in the Norwegian Armed Forces, a traditionally male environment, using survey measures of competitiveness that are known to be correlated with competitive behavior in the lab. We find that there is selection into the environment but that there is still a gender difference at baseline. We further find that the competitive preferences become stronger for both women and men over a period of eight weeks. The changes are large enough to eliminate the initial gender gap if only women had been exposed to the setting. Classification-JEL: Creation-Date: 2021-11-29 File-URL: https://doi.org/10.2139/ssrn.3973657 File-Format: text/html DOI: 10.2139/ssrn.3973657 Keywords: Competitiveness, Gender, Endogenous preferences Handle: RePEc:oml:wpaper:202104