Finite Order Implications of Common Priors
刻画了共同先验假设对有限阶信念的含义，证明在有限模型中，其唯一含义来自更弱的共同支撑假设。
I characterize the implications of the common prior assumption for finite orders of beliefs about beliefs at a state and show that in finite models, the only such implications are those stemming from the weaker assumption of a common support. More precisely, given any finite N and any finite partitions model where priors have the same support, there is another finite partitions model with common priors that has the same nth order beliefs and knowledge for all n≤N.