Search Results - subject:"negative binomial"

Random effects regression models for count data with excess zeros in caries research

Todem, D.; Zhang, Y.; Ismail, A.; Sohn, W. - In: Journal of Applied Statistics 37 (2010) 10, pp. 1661-1679

We extend the family of Poisson and negative binomial models to derive the joint distribution of clustered count …

Persistent link: https://www.econbiz.de/10008674945

Regression in a copula model for bivariate count data

Nikoloulopoulos, Aristidis; Karlis, Dimitris - In: Journal of Applied Statistics 37 (2010) 9, pp. 1555-1568

In many cases of modeling bivariate count data, the interest lies on studying the association rather than the marginal properties. We form a flexible regression copula-based model where covariates are used not only for the marginal but also for the copula parameters. Since copula measures the...

Persistent link: https://www.econbiz.de/10008674976

An Econometric Analysis of Veterans Health Care Utilization Using Two-part Models

Lahiri, Kajal; Xing, Guibo - University at Albany, SUNY, Department of Economics - 2001

Based on 1992 US National Survey of Veterans, we analyzed the nature of veterans' inpatient and outpatient health care utilization by estimating a count data two-part hurdle model. We also identified factors that affect veterans' choices between VA and non- VA health care facilities, using a...

Persistent link: https://www.econbiz.de/10008517758

The Effectiveness of an Electronic Security Management System in a Privately Owned Apartment Complex

Greenberg, David F.; Roush, Jeffrey B. - In: Evaluation Review 33 (2009) 1, pp. 3-26

Poisson and negative binomial regression methods are used to analyze the monthly time series data to determine the …

Persistent link: https://www.econbiz.de/10010802832

Composite Likelihood Modeling of Neighboring Site Correlations of DNA Sequence Substitution Rates

Deng, Ling; Moore, Dirk - In: Statistical Applications in Genetics and Molecular Biology 8 (2009) 1, pp. 6-6

Sequence data from a series of homologous DNA segments from related organisms are typically polymorphic at many sites, and these polymorphisms are the result of evolutionary processes. Such data may be used to estimate the substitution rates as well as the variability of these rates. Careful...

Persistent link: https://www.econbiz.de/10005246482

Recursive Evaluation of Some Bivariate Compound Distributions

Vernic, Raluca - Universitatea Ovidius <Constanta> - 1999

distributions; bivariate distributions: distribution, bivariate Negative Binomial, bivariate Poisson. Trinomial I. INTRODUCTION … distribution, bivariate Negative Binomial and bivariate Poisson. 2. RECURSION FOR THE BIVARIATE COMPOUND DISTRIBUTION In this … Particular case 2. The bivariate Negative Binomial distribution parameters (A, 01,02), A > 0, 01,02 E (0, 1) has the p.f. F …

Persistent link: https://www.econbiz.de/10005847162

Modelling trade-by-trade price movements of multiple assets using multivariate compount Poisson processes

Shephard, Neil; Rydberg, Tina Hviid - Department of Economics, Oxford University - 1999

In this paper we extend Rydberg-Shephards acivity, direction and size decomposition of trade-by-trade price movements to the mulvariate case. We illustrate our ideas using a bivariate modelling problem - modelling the evolution of the prices of Ford and GM shares. Throughout we use the...

Persistent link: https://www.econbiz.de/10010605061

Semiparametric estimation for the dispersion parameter in the analysis of over- or underdispersed count data

Saha, Krishna - In: Journal of Applied Statistics 35 (2008) 12, pp. 1383-1397

This paper investigates several semiparametric estimators of the dispersion parameter in the analysis of over- or underdispersed count data when there is no likelihood available. In the context of estimating the dispersion parameter, we consider the double-extended quasi-likelihood (DEQL), the...

Persistent link: https://www.econbiz.de/10005492135

SERVICE LEVEL ANALYSIS OF (S - 1, S) INVENTORY POLICY FOR NEGATIVE BINOMIAL DISTRIBUTED FAILURES

AHN, SUNEUNG; KIM, WOOHYUN - In: Asia-Pacific Journal of Operational Research (APJOR) 25 (2008) 06, pp. 827-835

replenishment lead time should be interpreted first. In case of the negative binomial distributed failures, the presented …

Persistent link: https://www.econbiz.de/10005047141

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

, engineering, and agriculture. Zero-inflated Poisson (ZIP) regression and zero-inflated negative binomial (ZINB) regression are …

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