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Dokumenttyp:
Zeitschriftenaufsatz 
Autor(en):
Czado, C.; V., Erhardt; A., Min; S., Wagner 
Nicht-TUM Koautoren:
ja 
Kooperation:
national 
Titel:
Zero-inflated generalized Poisson models with regression effects on the mean, dispersion and zero-inflation level applied to patent outsourcing rates 
Abstract:
This paper focuses on an extension of zero-inflated generalized Poisson (ZIGP) regression models for count data. We discuss generalized Poisson (GP) models where dispersion is modelled by an additional model parameter. Moreover, zero-inflated models, in which overdispersion is assumed to be caused by an excessive number of zeros, are discussed. In addition to ZIGP models considered by several authors, we now allow for regression on the overdispersion and zero-inflation parameters. Consequently,...    »
 
Intellectual Contribution:
Discipline-based Research 
Zeitschriftentitel:
Statistical Modelling 
Jahr:
2007 
Band / Volume:
Heft / Issue:
Seitenangaben Beitrag:
125-153 
Reviewed:
ja 
Sprache:
en 
Semester:
SS 02 
Format:
Text 
Key publication:
Nein 
Peer reviewed:
Ja 
International:
Ja 
Book review:
Nein 
commissioned:
not commissioned 
Professional Journal:
Nein