experiments. This has been taken as evidence for internal motivations such as guilt aversion or preference for promise keeping … that communication increases the overall level of cooperation in our experiments with double-blind payoff procedures …. However, we also find no evidence that communication impacts cooperation in our experiments with single-blind payoff …

high contributions. No deception is used and the data cohere well both internally and with other public goods experiments … implements a new experimental design, the Conditional Information Lottery, which offers all the benefits of deception without … actually deceiving anyone. The design should be suitable for most economics experiments, and works by a modification of an …

counseled to lift their de facto prohibition against deception to capture its potential benefits. To the extent that this … on a discussion of the methodological costs and benefits of deception, we conclude that experimental economists …' prohibition of deception is a sensible convention that economists should not abandon. Copyright Kluwer Academic Publishers 2002 …

predictive under general conditions and to organize data well in previous experiments meant to test other concepts. In a new …