My dissertation examines how prosocial and selfish incentives affect individuals' willingness to compete as a critical behavioral choice, and the role of gender in this relationship. Understanding more about this connection is key, as men are more competitive than women, on average, and higher levels of competitiveness are correlated with positive career outcomes. Using insights from economics and psychology, I test and expand theory that individuals become more willing to compete when the rewards benefit a charity or another individual. I suggest practical implications for organizational designers who seek to reduce gender gaps in wages and achievement.