-play communication: numerical (tabular) only, and verbal and numerical. We find that either kind of pre-play communication increases … trusting, trustworthiness, or both, in inter-subject comparisons, but that the inclusion of verbal communication generates both …

We examine communication in a 2-player sequential public good game in which the leader has private information about … deciding whether or not to contribute. Without communication, the unique equilibrium is fully efficient. We study whether the … introduction of communication about returns can destroy efficiency. Communication can be precise (about the exact return), or vague …