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A species sampling model with finitely many types. (English) Zbl 1202.60056
Summary: A two-parameter family of exchangeable partitions with a simple updating rule is introduced. The partition is identified with a randomized version of a standard symmetric Dirichlet species-sampling model with finitely many types. A power-like distribution for the number of types is derived.

MSC:
60G09 Exchangeability for stochastic processes
60C05 Combinatorial probability
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