Gossner, Olivier; Kalai, Ehud; Weber, Robert - 2009
disassociation under common knowledge (the agents' types are independent, conditional on some common-knowledge variable). Subjective … that disassociates types is more informative than any common-knowledge variable. With three or more agents, conditions (i …) and (ii) are equivalent. They also imply that any variable which is common knowledge to two agents is common knowledge to …