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Semi-parametric tail inference through probability-weighted moments
Authors:Frederico Caeiro  M Ivette Gomes
Institution:a New University of Lisbon and CMA, Faculdade de Ciências e Tecnologia, 2829-516 Caparica, Portugal
b University of Lisbon, DEIO and CEAUL, Faculdade de Ciências, Campo Grande, 1749-016 Lisboa, Portugal
Abstract:In this paper, for heavy-tailed models, and working with the sample of the k largest observations, we present probability weighted moments (PWM) estimators for the first order tail parameters. Under regular variation conditions on the right-tail of the underlying distribution function F we prove the consistency and asymptotic normality of these estimators. Their performance, for finite sample sizes, is illustrated through a small-scale Monte Carlo simulation.
Keywords:Heavy tails  Extreme value index  First order scale parameter  Semi-parametric estimation  Statistics of extremes
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