Výsledky vyhledávání - "Márcia D. Branco"

Bias Correction in Clustered Underreported Data

Autor: Rosangela H. Loschi, Raffaele Argiento, Renato M. Assunção, Fabrizio Ruggeri, Márcia D. Branco, Guilherme Lopes de Oliveira

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

Data quality from poor and socially deprived regions have given rise to many statistical challenges. One of them is the underreporting of vital events leading to biased estimates for the associated risks. To deal with underreported count data, models

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::624f5288b33f3d82cf1bd73d9423ac81
http://hdl.handle.net/10807/163433

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Bayesian state-space approach to biomass dynamic models with skewed and heavy-tailed error distributions

Autor: Carlos Montenegro, Márcia D. Branco

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

We use the state-space approach to the logistic population growth model to update our knowledge of a population of marine shrimp off the Chilean coast. The unobserved state is the annual shrimp biomass, and the observation is the mean catch per unit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e97cdc5522cafee958fa6e14b3804899
https://doi.org/10.1016/j.fishres.2016.03.021

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Concentration function for the skew-normal and skew-$t$ distributions, with application in robust Bayesian analysis

Autor: Luciana Graziela de Godoi, Fabrizio Ruggeri, Márcia D. Branco

Publikováno v: Braz. J. Probab. Stat. 31, no. 2 (2017), 373-393
Brazilian Journal of Probability and Statistics 31 (2017): 373–393. doi:10.1214/16-BJPS318
info:cnr-pdr/source/autori:L. de Godoi, M. Branco, and F. Ruggeri/titolo:Concentration function for the skew-normal and skew-t distributions, with application in robust Bayesian analysis/doi:10.1214%2F16-BJPS318/rivista:Brazilian Journal of Probability and Statistics/anno:2017/pagina_da:373/pagina_a:393/intervallo_pagine:373–393/volume:31
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

Data from many applied fields exhibit both heavy tail and skewness behavior. For this reason, in the last few decades, there has been a growing interest in exploring parametric classes of skew-symmetrical distributions. A popular approach to model de

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d242b542ff7fb273d821d77f0aed8df3
http://projecteuclid.org/euclid.bjps/1492156968

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Bayesian robustness under a skew-normal class of prior distribution

Autor: Luciana Graziela de Godoi, Márcia D. Branco

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP

We develop a global sensitivity analysis to measure the robustness of the Bayesian estimators with respect to a class of prior distributions. This class arises when we consider multiplicative contamination of a base prior distribution. A similar stru

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c23b3e7087d85acd035256725754222c
https://doi.org/10.1016/j.ijar.2014.03.004

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Objective Bayesian Analysis of Skew-tDistributions

Autor: Brunero Liseo, Marc G. Genton, Márcia D. Branco

Publikováno v: Scandinavian Journal of Statistics. 40:63-85

We study the Jeffreys prior and its properties for the shape parameter of univariate skew-t distributions with linear and nonlinear Student's t skewing functions. In both cases, we show that the resulting priors for the shape parameter are symmetric

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cba89dd03c8d65b837542b86cf3c9d14
https://doi.org/10.1111/j.1467-9469.2011.00779.x

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Bayesian analysis for nonlinear regression model under skewed errors, with application in growth curves

Autor: Márcia D. Branco, Rolando de la Cruz

Publikováno v: Biometrical Journal. 51:588-609

We have considered a Bayesian approach for the nonlinear regression model by replacing the normal distribution on the error term by some skewed distributions, which account for both skewness and heavy tails or skewness alone. The type of data conside

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5120a817d23cdde3a2e05cdafc3c11b
https://doi.org/10.1002/bimj.200800154

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A unified view on skewed distributions arising from selections

Autor: Reinaldo B. Arellano-Valle, Márcia D. Branco, Marc G. Genton

Publikováno v: CANADIAN JOURNAL OF STATISTICS
Artículos CONICYT
CONICYT Chile
instacron:CONICYT

Parametric families of multivariate nonnormal distributions have received considerable attention in the past few decades. The authors propose a new definition of a selection distribution that encompasses many existing families of multivariate skewed

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd8b8f64c80388fef6dc9521782be237
https://doi.org/10.1002/cjs.5550340403

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Extensions of the skew-normal ogive item response model

Autor: Heleno Bolfarine, Jorge Luis Bazán, Márcia D. Branco

Publikováno v: Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Braz. J. Probab. Stat. 28, no. 1 (2014), 1-23

We introduce new applications of the skew-probit IRT model by considering a flexible skew-normal distribution for the latent variables and by extending this model to include an additional random effect for modeling dependence between items within the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb8d1a22449d94905762b49777bad492

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A General Class of Multivariate Skew-Elliptical Distributions

Autor: Dipak K. Dey, Márcia D. Branco

Publikováno v: Journal of Multivariate Analysis. 79(1):99-113

This paper proposes a general class of multivariate skew-elliptical distributions. We extend earlier results on the so-called multivariate skew-normal distribution. This family of distributions contains the multivariate normal, Student's t, exponenti

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Bayesian analysis of the calibration problem under elliptical distributions

Autor: Heleno Bolfarine, Pilar L. Iglesias, Reinaldo B. Arellano-Valle, Márcia D. Branco

Publikováno v: JOURNAL OF STATISTICAL PLANNING AND INFERENCE
Artículos CONICYT
CONICYT Chile
instacron:CONICYT

In this paper we discuss calibration problems under dependent and independent elliptical family of distributions. In the dependent case, it is shown that the posterior distribution of the quantity of interest is robust with respect to the distributio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::430163d020167f6c129959ad5c37aa42
https://doi.org/10.1016/s0378-3758(00)00110-5

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