Finite Order Implications of Common Priors

I characterize the implications of the common prior assumption for finite orders of beliefs about beliefs at a state and show that the only such implications are those stemming from the weaker assumption of a common support. More precisely, given any model where priors have the same support and any finite $N$, there is another model with common priors which has the same $n^{\rm th}$ order beliefs for all $n\ne N$.