members of an information sharingCooperative. Once collected, information about the location of productive sh-ing sites is an … excludable public good. We show that independent shermen donot internalize the full value of information and do not replicate rst …-best searchpatterns. An information sharing Cooperative faces a free-riding problem as eachmember prefers that another undertake costly …

,questions whether norm deviations can be detected and thus punished. By investing in information acquisition, aresponder in an ultimatum … can be rather high (‘high payoff mode’) orlow (‘low payoff mode’). The responder can buy information about the proposer … buy reward information (30 out of 55). Buyingreward information on average did not help the responder nor did it improve …

formation. As opposed to previous findings in the CPR literature we observe that full information disclosure significantly … changes individual behaviour and aggregate use of the common property. Groups that had complete information about other … reduces aggregate extraction but does not reach full efficiency. Full information and communication leads to the formation of …