We show that for many classes of symmetric two-player games, the simple decision rule “imitate-if-better” can hardly be beaten by any strategy. We provide necessary and sufficient conditions for imitation to be unbeatable in the sense that there is no strategy that can exploit imitation as a...

Providing incentives to subjects in internet experiments can be tricky. One simple method is a high score (as in computer games). We test whether high scores provide adequate incentives in comparison to the usual performance based incentives. We find significant differences.

The approach by Engelberg, Manski, and Williams (2009) to convert probabilistic survey responses into continuous probability distribution requires that the question intervals are equally wide. Almost all recently established household surveys have intervals of varying widths. Applying the...