Cheap Talk and Secret Intentions in a Public Goods Experiment

In a public goods experiment, subjects can vary over a period of stochasticlength two contribution levels: one is publicly observable (their cheap talkstated intention), while the other is not seen by the others (their secretintention). When the period suddenly stops, participants are restricted tochoose as actual contribution either current alternative. Based on the twotypes of choice data for a partners and a perfect strangers condition, weconfirm that final outcomes strongly depend on the matching protocol. Asto choice dynamics, we distinguish different types of adaptations.