Moghimbeigi, Abbas; Eshraghian, Mohammed Reza; … - In: Journal of Applied Statistics 35 (2008) 10, pp. 1193-1202
Count data with excess zeros often occurs in areas such as public health, epidemiology, psychology, sociology, engineering, and agriculture. Zero-inflated Poisson (ZIP) regression and zero-inflated negative binomial (ZINB) regression are useful for modeling such data, but because of hierarchical...