Mathematics – Probability
Scientific paper
2007-07-23
Statistics & Probability Letters, 78, (2008) 3123 - 3128
Mathematics
Probability
13 pages
Scientific paper
10.1016/j.spl.2008.05.027
We show that a Gibbs characterization of normalized generalized Gamma processes, recently obtained in Lijoi, Pr\"unster and Walker (2007), can alternatively be derived by exploiting a characterization of exponentially tilted Poisson-Kingman models stated in Pitman (2003). We also provide a completion of this result investigating the existence of normalized random measures inducing exchangeable Gibbs partitions of type $\alpha \in (-\infty, 0]$.
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