@article{eprints975, pages = {527--546}, publisher = {Applied Probability Trust}, journal = {Journal of applied probability }, number = {2}, title = {A central limit theorem and its applications to multicolor randomly reinforced urns}, year = {2011}, volume = {48}, author = {Patrizia Berti and Irene Crimaldi and Luca Pratelli and Pietro Rigo}, abstract = {Let Xn be a sequence of integrable real random variables, adapted to a filtration (Gn). Define Cn = {$\sqrt{}$}\{(1 / n)?k=1nXk - E(Xn+1 {\ensuremath{|}} Gn)\} and Dn = {$\sqrt{}$}n\{E(Xn+1 {\ensuremath{|}} Gn) - Z\}, where Z is the almost-sure limit of E(Xn+1 {\ensuremath{|}} Gn) (assumed to exist). Conditions for (Cn, Dn) {$\rightarrow$} N(0, U) x N(0, V) stably are given, where U and V are certain random variables. In particular, under such conditions, we obtain {$\sqrt{}$}n\{(1 / n)?k=1nX\_k - Z\} = Cn + Dn {$\rightarrow$} N(0, U + V) stably. This central limit theorem has natural applications to Bayesian statistics and urn problems. The latter are investigated, by paying special attention to multicolor randomly reinforced urns. }, keywords = {Bayesian statistics; central limit theorem; empirical distribution; Poisson-Dirichlet process; predictive distribution; random probability measure; stable convergence; urn model}, url = {http://eprints.imtlucca.it/975/} }