Search Results - subject:"zero inflation"

The co-occurrence of self-observed norm-conforming behavior, reduction of zero observations and remaining measurement quality

Landsheer, Johannes - In: Quality & Quantity: International Journal of Methodology 48 (2014) 5, pp. 2647-2656

Norm-violating behavior is characterized by clear social norms which prescribe the non-occurrence of that behavior. From the theoretical framework of Allport it is derived that specifically norm-conformation is consistent, while violating norms is expected to be inconsistent and more...

Persistent link: https://www.econbiz.de/10010993020

Non nested model selection for spatial count regression models with application to health insurance

Czado, Claudia; Schabenberger, Holger; Erhardt, Vinzenz - In: Statistical Papers 55 (2014) 2, pp. 455-476

In this paper we consider spatial regression models for count data. We examine not only the Poisson distribution but also the generalized Poisson capable of modeling over-dispersion, the negative Binomial as well as the zero-inflated Poisson distribution which allows for excess zeros as possible...

Persistent link: https://www.econbiz.de/10010998552

Zero-inflated Poisson regression mixture model

Lim, Hwa Kyung; Li, Wai Keung; Yu, Philip L.H. - In: Computational Statistics & Data Analysis 71 (2014) C, pp. 151-158

Excess zeros and overdispersion are common phenomena that limit the use of traditional Poisson regression models for modeling count data. Both excess zeros and overdispersion caused by unobserved heterogeneity are accounted for by the proposed zero-inflated Poisson (ZIP) regression mixture...

Persistent link: https://www.econbiz.de/10010719675

Flexible dependence modeling of operational risk losses and its impact on total capital requirements

Brechmann, Eike; Czado, Claudia; Paterlini, Sandra - In: Journal of banking & finance 40 (2014), pp. 271-270

Persistent link: https://www.econbiz.de/10010402193

Zero-inflated generalized Poisson models with regression effects on the mean, dispersion and zero-inflation level applied to patent outsourcing rates

Czado, Claudia; Erhardt, Vinzenz; Min, Aleksey - 2006

regression introduced by Famoye and Singh (2003), we now allow for regression on the overdispersion and zero-inflation parameters …. Consequently, we propose tools for an exploratory data analysis on the dispersion and zero-inflation level. An application dealing … overall dispersion and zero-inflation parameters demonstrating the usefulness of our proposed extensions. …

Persistent link: https://www.econbiz.de/10010266132

Trend inflation as a workers’ discipline device

Bartolomeo, Giovanni Di; Tirelli, Patrizio; Acocella, Nicola - In: Empirica 40 (2013) 2, pp. 215-235

The paper shows that a monetary policy regime that allows for a positive inflation rate disciplines monopolistic wages setters if these, when setting contracts, internalize the consequences of their choices for economic outcomes over the life of the contract. We also show that discretionary...

Persistent link: https://www.econbiz.de/10010868553

Score tests for zero-inflation and overdispersion in two-level count data

Lim, Hwa Kyung; Song, Juwon; Jung, Byoung Cheol - In: Computational Statistics & Data Analysis 61 (2013) C, pp. 67-82

suggested to analyze such data. Previous studies have proposed score statistics for testing zero-inflation and overdispersion … separately in correlated count data. Here, we also deal with simultaneous score tests for zero-inflation and overdispersion in … two-level count data by using the ZINB mixed regression model. Score tests are suggested for (1) zero-inflation in the …

Persistent link: https://www.econbiz.de/10010617228

What belongs where? Variable selection for zero-inflated count models with an application to the demand for health care

Jochmann, Markus - In: Computational Statistics 28 (2013) 5, pp. 1947-1964

This paper develops a Bayesian spike and slab model for zero-inflated count models which are commonly used in health economics. We account for model uncertainty and allow for model averaging in situations with many potential regressors. The proposed techniques are applied to a German data set...

Persistent link: https://www.econbiz.de/10010698288

Trend inflation as a workers’ discipline device

Di Bartolomeo, Giovanni; Tirelli, Patrizio; Acocella, Nicola - In: Empirica : journal of european economics 40 (2013) 2, pp. 215-235

Persistent link: https://www.econbiz.de/10009745773

Zero Tolerance Ecology: Improving Ecological Inference By Modelling the Source of Zero Observations

Martin, Tara G.; Wintle, Brendan A.; Rhodes, Jonathan R.; … - 2005

-inflated datasets, we use practical examples to demonstrate how failing to account for the source of zero-inflation can reduce our …

Persistent link: https://www.econbiz.de/10009447984