A new model, rejecting solutions optimal only for a single preciselydefined future, generates answers representing the best compromisebetween risks and opportunities in all likely futures.

We exploit the aggregative structure of the public good modelto provide a simple analysis of the voluntary contribution game. Incontrast to the best response function approach, ours avoids the pro-liferation of dimensions as the number of players is increased, andcan readily analyse games...

The paper proves that in two-player logit form symmetric contestswith concave success function, commitment to a particular strategydoes not increase a player's payo, while in contests with more thantwo players it does. The paper also provides a contest-like game inwhich commitment does not...

We demonstrate that in simple 2 X 2 games (cumulative) prospect theorypreferences can be evolutionarily stable, i.e. a population of players withprospect theory preferences can not be invaded by more rational players. Thisholds also if probability weighting is applied to the probabilities of...