search for information. Contracts canbe written to improve upon free-riding, however they may create inefficient … 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 …

,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 …