Birnbaum-Saunders power-exponential kernel density estimation and Bayes local bandwidth selection for nonnegative heavy tailed data. (English) Zbl 1417.62069
Summary: In this paper, we study the performance of the Birnbaum-Saunders-power-exponential (BS-PE) kernel and Bayesian local bandwidth selection in the context of kernel density estimation for nonnegative heavy tailed data. Our approach considers the BS-PE kernel estimator and treats locally the bandwidth \(h\) as a parameter with prior distribution. The posterior density of \(h\) at each point \(x\) (point where the density is estimated) is derived in closed form, and the Bayesian bandwidth selector is obtained by using popular loss functions. The performance evaluation of this new procedure is carried out by a simulation study and real data in web-traffic. The proposed method is very quick and very competitive in comparison with the existing global methods, namely biased cross-validation and unbiased cross-validation.
MSC:
| 62G07 | Density estimation |
| 62F15 | Bayesian inference |
| 62G05 | Nonparametric estimation |
| 62G20 | Asymptotic properties of nonparametric inference |
Keywords:
biased cross validation; Bayesian bandwidth selector; integrated squared error; loss functions; prior distribution; unbiased cross validationSoftware:
KernSmoothReferences:
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