Elinor Ostrom discusses the evolution of social norms and collective action. She challenges the traditional view that rational, self-interested individuals will not act in their group's interest unless there is coercion or a small group size. She argues that empirical research shows that people often contribute to public goods, tax, and voluntary associations, contradicting the zero contribution thesis from the N-person Prisoner's Dilemma game. Ostrom highlights that while the temptation to free ride is universal, participants in self-organized resource governance regimes invest in monitoring to reduce free riding. However, empirical findings have not yet been integrated into a revised theory of collective action. Ostrom proposes that self-organized groups can survive long-term if they develop governance arrangements consistent with design principles. She emphasizes the importance of contextual variables that help individuals identify each other's past behavior, which is crucial for the success of social norms. She argues that the standard model of rational choice is insufficient to explain collective action, as laboratory experiments show that subjects often contribute more than predicted. These findings suggest that individuals are influenced by social norms and the behavior of others. Ostrom discusses the role of communication, social norms, and endogenous sanctioning in promoting cooperation. She notes that communication increases cooperation, and that individuals are willing to punish free riders. She also highlights the importance of trust and reciprocity in collective action, as well as the impact of social norms on individual behavior. Ostrom concludes that the standard model of rational choice is insufficient to explain collective action, and that a more comprehensive theory incorporating social norms and contextual variables is needed. She argues that the evolution of social norms and the role of learning and culture are essential in understanding collective action.Elinor Ostrom discusses the evolution of social norms and collective action. She challenges the traditional view that rational, self-interested individuals will not act in their group's interest unless there is coercion or a small group size. She argues that empirical research shows that people often contribute to public goods, tax, and voluntary associations, contradicting the zero contribution thesis from the N-person Prisoner's Dilemma game. Ostrom highlights that while the temptation to free ride is universal, participants in self-organized resource governance regimes invest in monitoring to reduce free riding. However, empirical findings have not yet been integrated into a revised theory of collective action. Ostrom proposes that self-organized groups can survive long-term if they develop governance arrangements consistent with design principles. She emphasizes the importance of contextual variables that help individuals identify each other's past behavior, which is crucial for the success of social norms. She argues that the standard model of rational choice is insufficient to explain collective action, as laboratory experiments show that subjects often contribute more than predicted. These findings suggest that individuals are influenced by social norms and the behavior of others. Ostrom discusses the role of communication, social norms, and endogenous sanctioning in promoting cooperation. She notes that communication increases cooperation, and that individuals are willing to punish free riders. She also highlights the importance of trust and reciprocity in collective action, as well as the impact of social norms on individual behavior. Ostrom concludes that the standard model of rational choice is insufficient to explain collective action, and that a more comprehensive theory incorporating social norms and contextual variables is needed. She argues that the evolution of social norms and the role of learning and culture are essential in understanding collective action.