قارن الطرق

	نموذج العائق لبيانات العد	انحدار بواسون ذي التضخم الصفري (ZIP)
المجال	الإحصاء	الإحصاء
العائلة	Regression model	Regression model
سنة النشأة	1986	1992
صاحب الطريقة	Mullahy	Diane Lambert
النوع	Two-part count model	Count regression (two-component mixture)
المصدر التأسيسي	Mullahy, J. (1986). Specification and Testing of Some Modified Count Data Models. Journal of Econometrics, 33(3), 341–365.	Lambert, D. (1992). Zero-Inflated Poisson Regression, with an Application to Defects in Manufacturing. Technometrics, 34(1), 1–14.
الأسماء البديلة	hurdle count model, two-part count model, zero-truncated count model, Engel Modeli (Hurdle Model)	ZIP regression, zero-inflated count model, Sıfır-Şişirilmiş Poisson Regresyonu (ZIP)
ذات صلة	5	4
الملخص	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.	Zero-Inflated Poisson regression is a two-component model for count data that contains more zeros than an ordinary Poisson model can explain. Introduced by Diane Lambert in 1992, it combines a logistic model for the zero-generating mechanism with a Poisson model for the genuine counting process.