RT Monograph SR 00 A1 Attanasi, Giuseppe Marco A1 Garcia-Gallego, Aurora A1 Georgantzis, Nikolaos A1 Montesano, Aldo T1 An Experiment on Prisoner’s Dilemma with Confirmed Proposals YR 2011 FD 2011-12 VO 11-274 K1 Prisoner’s Dilemma K1 Bargaining K1 Confirmed Proposals K1 Confirmed Agreement K1 Tacit Communication AB We apply an alternating proposals protocol with a confirmation stage as a way of solving a Prisoner’s Dilemma game. We interpret players’ proposals and (no) confirmation of outcomes of the game as a tacit communication device. The protocol leads to unprecedented high levels of cooperation in the laboratory. Assigning the power of confirmation to one of the two players alone, rather than alternating the role of a leader significantly increases the probability of signing a cooperative agreement in the first bargaining period. We interpret pre-agreement strategies as tacit messages on players’ willingness to cooperate and on their beliefs about the others’ type. T2 TSE Working Paper PB TSE Working Paper AV Published LK https://publications.ut-capitole.fr/id/eprint/15187/ UL http://tse-fr.eu/pub/25463