This paper describes a general principle that can be used to elicit honest opinions, even if risk attitudes are unknown. JEL Classification: D83

Two long lived players play a repeated coordination game. Players do not specify a single (and correct) probability to each event. They have a vague notion about the evolution of the play, called blurry beliefs, which guide their behavior. General conditions that ensure cooperation are...

A stage game is played infinitely many times. After observing the outcomes of the games, players revise their beliefs about opponents' strategies. I show the general conditions under which players' predictions become accurate fast. Key words: Repeated Games, Rational Learning, Speed of...

Theories can be produced by individuals seeking a good reputation of knowledge. Hence, a significant question is how to test theories anticipating that they might have been produced by (potentially uninformed) experts who prefer their theories not to be rejected. If a theory that predicts...