[ABE-L] Seminário Conjunto UFSCar/ICMC 02/10/2015 - 14h00 - no ICMC-USP

[Rafael Izbicki]

Divulgação da palestra desta semana do Seminário do Programa
Interinstitucional de Pós-graduação em Estatística
<http://www.icmc.usp.br/Portal/conteudo/1096/13/interinstitucional-de-pos-graduacao-em-estatistica>
 (PIPGEs ICMC/USP e UFSCar), São Carlos.

Título: Zero-Modified Power Series Models

*Palestrante:* Katiane S. Conceição, ICMC-USP.


*Resumo:*

In this work, we present a family of distributions for count data, the so
called Zero-Modified Power Series, which is an extension of the Power
Series distributions family whose support starts at zero. This extension
consists in modifying the probability of observing zero of each Power
Series distribution, allowing the new zero-modified distribution
appropriately accommodate datasets which have any amount of zero
observations (for instance, zero-inflated or zero-deflated datasets). Power
Series distributions included in the Zero-Modified Power Series family are:
Poisson, Generalized Poisson, Geometric, Binomial, Negative Binomial and
Generalized Negative Binomial. We introduce the Zero-Modified Power Series
regression models and propose a Bayesian approach considering information
matrix priori. Two real datasets, corresponding to leptospirosis
notifications in cities of Bahia State at Brazil, are analyzed. We
emphasize that the proposed Zero-Modified Power Series family distributions
and their regression versions can accommodate sets of count data without
any previous knowledge about the characteristic of zero-inflation
(-deflation) present in the dataset.


*Local*: *A**uditório Luiz Antonio Fávaro** (sala **4-111**)* – ICMC-USP,
São Carlos, SP.


*Dia/Horário*: 02/10/2015 - 14h00



--
Rafael Izbicki
Assistant Professor
Department of Statistics
Federal University of São Carlos (UFSCar)
rizbicki.wordpress.com
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