Ugo Bolletta : ugo.bolletta[at]univ-amu.fr
Mathieu Faure : mathieu.faure[at]univ-amu.fr
We consider multi-stage games, where at each stage, players receive private signals about past and current states, past actions and past signals, and choose actions. We fully characterize the distributions over actions, states, and signals that obtain in any (sequential) communication equilibrium of any expansion of multi-stage games, i.e., when players can receive additional signals. We interpret our results as revelation principles. We apply our characterization to bilateral bargaining.