Search Results - subject:"zero inflation"

Multilevel zero-inflated negative binomial regression modeling for over-dispersed count data with extra zeros

Moghimbeigi, Abbas; Eshraghian, Mohammed Reza; … - In: Journal of Applied Statistics 35 (2008) 10, pp. 1193-1202

useful for modeling such data, but because of hierarchical study design or the data collection procedure, zero-inflation and …

Persistent link: https://www.econbiz.de/10005639759

Functional Form and Heterogeneity in Models for Count Data

Greene, William - In: Foundations and Trends(R) in Econometrics 1 (2007) 2, pp. 113-218

flexible (and more natural) than the log gamma form, and provides a platform for several "two part" extensions, including zero … inflation, hurdle, and sample selection models. (We briefly present some alternative approaches to modeling heterogeneity.) We …

Persistent link: https://www.econbiz.de/10010990812

IN SEARCH OF THE AVERAGE TRANSNATIONAL TERRORIST ATTACK VENUE

Drakos, Konstantinos; Gofas, Andreas - In: Defence and Peace Economics 17 (2006) 2, pp. 73-93

In this paper we develop an empirical model for transnational terrorist activity for a panel consisting of 139 countries over the period 1985-1998. Essentially, we attempt to sketch the profile of the average terrorist attack venue. Our findings suggest that the terrorist attack venue is, on...

Persistent link: https://www.econbiz.de/10005495937

Modelling bivariate count series with excess zeros

School of Public Health

inferences. A class of bivariate zero-inflated Poisson autoregression models is presented to accommodate the zero-inflation and …

Persistent link: https://www.econbiz.de/10009479406

Adopt a hypothetical pup’: A count data approach to the valuation of wildlife.

Martinez-Espineira, Roberto - EconWPA - 2004

The willingness to pay for a coyote conservation program is estimated using a novel payment-vehicle, based on how many oyotes respondents would be willing to sponsor. This hypothetical scenario mimics an increasingly popular type of actual market. Data from a phone survey conducted in Prince...

Persistent link: https://www.econbiz.de/10005556125

Adopt a hypothetical pup: A count data approach to the valuation of wildlife.

Martinez-Espineira, Roberto - EconWPA - 2004

The willingness to pay for a coyote conservation program is estimated using a novel payment-vehicle, based on how many coyotes respondents would be willing to sponsor. This hypothetical scenario mimics an increasingly popular type of actual market. Data from a phone survey conducted in Prince...

Persistent link: https://www.econbiz.de/10005118914

The “Productivity Norm” versus Zero Inflation in the History of Economic Thought

Selgin, George - In: History of Political Economy 27 (1995) 4, pp. 705-735

Persistent link: https://www.econbiz.de/10010582869