Comparar métodos

	Modelo de Obstáculo para Dados de Contagem	Regressão de Poisson e Binomial Negativa
Área	Estatística	Econometria
Família	Regression model	Regression model
Ano de origem	1986	1998
Autor original	Mullahy	Cameron & Trivedi (textbook treatment); Hilbe (negative binomial)
Tipo	Two-part count model	Generalized linear model for count data
Fonte seminal	Mullahy, J. (1986). Specification and Testing of Some Modified Count Data Models. Journal of Econometrics, 33(3), 341–365.	Cameron, A. C. & Trivedi, P. K. (1998). Regression Analysis of Count Data. Cambridge University Press.
Outros nomes	hurdle count model, two-part count model, zero-truncated count model, Engel Modeli (Hurdle Model)	count regression, log-linear count model, negative binomial regression, Poisson / Negatif Binom Regresyon
Relacionados	5	4
Resumo	The hurdle model is a two-part count-data model introduced by Mullahy (1986). A first stage models the binary choice of crossing a hurdle (a zero versus a non-zero count), and a second stage models the strictly positive counts with a zero-truncated distribution such as a zero-truncated Poisson or negative binomial.	Poisson regression is a generalized linear model for count outcomes — events tallied as non-negative integers such as hospital admissions, accidents, or article counts. It models the log of the expected count as a linear function of the predictors, and is developed in the standard count-data treatment of Cameron and Trivedi (1998); when the counts are over-dispersed, the closely related negative binomial model (Hilbe, 2011) is preferred.