We investigate the motives for cooperation in the one-shot Prisoner’s Dilemma (PD). A prior study finds that cooperation rates in one-shot PD games can be ranked empirically by the social surplus from cooperation. That study employs symmetric payoffs from cooperation in simultaneous PD games....

Evidence from psychology and marketing suggests that those who make a "precise" first offer in bargaining get a better deal than those who make a "round" first offer. We report on a series of experiments designed to test for and improve our understanding of the "precise first offer" (PFO) effect...

We present a model of boundedly rational play in single-shot 2 × 2 games. Players choose strategies based on the perceived salience of their own payoffs and, if own-payoff salience is uninformative, on the perceived salience of their opponent's payoffs. When own payoffs are salient, the model's...