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ESAIM: P&S, 1997, Vol. 1, pp. 17-33
DOI: 10.1051/ps:1997101
Asymptotic normality in mixture models
Sara Van De GeerUniversity of Leiden, Netherlands
Abstract
We study the estimation of a linear integral functional of
a distribution F, using i.i.d. observations which density
is a mixture of a family of densities k(.,y) under F. We
examine the asymptotic distribution of the estimator
obtained by plugging the non parametric maximum likelihood
estimator (NPMLE) of F in the functional. A problem here is
that usually, the NPMLE does not dominate
F.
Résumé
Nous cherchons à estimer une fonctionnelle intégrale linéaire
d'une fonction de répartition F sur la base d'observations
indépendantes et équidistribuées dont la densité s'exprime
comme un mélange sous F d'une famille de densités k(.,y).
Nous étudions la loi asymptotique de l'estimateur obtenu
en substituant à F , dans la fonctionnelle intégrale, un
estimateur du maximum de vraisemblance non paramétrique de F.
Un point délicat est ici que généralement cet estimateur du
maximum de vraisemblance non paramétrique ne domine pas F.
Key words: Asymptotic efficiency / asymptotic normality / differentiable functionals / maximum likelihood / mixture model.
© EDP Sciences, SMAI 1997
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