Political polarization has ruptured the fabric of U.S. society. I quantify this phenomenon through the use of 5 pre … existing polarization in the context of Donald J. Trump. I find strong heterogeneous effects: ingroup-love occurs in the … to cooperate. In a final step, I test whether popular behavioral interventions (defaults and norm-nudging) can eradicate …

true for nonenforceable contracts. The relationship of entitlements and obligations to norms is also discussed. …

shares specified are often based on focal points or historical norms, and seem excessively uniform given large and observable … that contractual norms have measurable effects on factor returns. I find that tenants on higher-quality farmland capture a …

disciplines, viz., groups, norms and sanctions. Secondly, it must be couched in a language familiar to the economics profession … to support the procurement of the group's collective good and submits to a system of norms and to the corresponding self …-organized sanctions regime punishing violation of group norms. The agent solves a sequence of optimization problems: the first determines …