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Определение априорного распределения в байесовском анализе при наличии исходной информации, основанное на минимизации информационной метрики

Определение априорного распределения в байесовском анализе при наличии исходной информации, основанное на минимизации информационной метрики

Abstract

В статье предлагается формальное правило, основанное на минимизации информационной метрики Кульбака-Лейблера, для определения априорного распределения при наличии информации, полученной из предыдущих наблюдений. В отличие от обычных предположений в эмпирическом байесовском анализе, в данной работе не требуется независимость параметров, рассматриваемых как случайные величины, соответствующие различным наблюдениям. Показано, что в случае, когда наблюдения, зависящие от параметра, и сам параметр распределены по нормальному закону, предлагаемое правило приводит к ML-II априорному распределению. Однако в случае регрессионного уравнения коэффициенты регрессии, полученные методом минимизации метрики Кульбака-Лейблера, отличаются от оценок, полученных при ML-II подходе. Также показано, что для нормальных распределений метрика Кульбака-Лейблера достигает асимптотически единственного минимума на истинном априорном распределении.

A formal rule for selection of a prior probability distribution based on minimization of the KullbackLeibler divergence, when data obtained from previous observations are available, is suggested. Contrary to a usual requirement in empirical Bayesian analysis, parameters for different observations are not assumed to be independent. In the case when both observations and parameters are normal, the procedure is equivalent to the ML-II approach. However regression coefficients obtained by minimization of the Kullback-Leibler divergence are different from the ML-II estimates. Finally, it is shown that in the case of normal distributions Kullback-Leibler divergence achieves asymptotically its only minimum at the true prior distribution.

Keywords

АПРИОРНЫЕ РАСПРЕДЕЛЕНИЯ,БАЙЕСОВСКАЯ МЕТОДОЛОГИЯ,ИНФОРМАЦИОННАЯ МЕТРИКА КУЛЬБАКА-ЛЕЙБЛЕРА,РЕГРЕССИОННЫЙ АНАЛИЗ,PRIOR PROBABILITY DISTRIBUTIONS,BAYESIAN METHODOLOGY,KULLBACK-LEIBLER DIVERGENCE,REGRESSION ANALYSIS

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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