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SORT	6 records found	Search took 0.00 seconds.

10 p, 2.8 MB

Flexible geoadditive survival analysis of non-Hodgkin lymphoma in Peru / Flores, Claudio (Universitat Politècnica de Catalunya. Departament de Estadística) ; Rodríguez-Girondo, Mar (Universidade de Vigo) ; Cadarso-Suárez, Carmen (Universidade de Santiago de Compostela. Departamento de Estatística, Análise Matemática e Optimización) ; Kneib, Thomas (Georg August University. Department of Economics) ; Gómez Melis, Guadalupe (Universitat Politècnica de Catalunya. Departament de Estadística) ; Casanova, Luis (Instituto Nacional de Enfermedades Neoplásicas (Lima, Perú))
Knowledge of prognostic factors is an important task for the clinical management of Non Hodgkin Lymphoma (NHL). In this work, we study the variables affecting survival of NHL in Peru by means of geoadditive Cox-type structured hazard regression models while accounting for potential spatial correlations in the survival times. [...]
2012
SORT : statistics and operations research transactions, Vol. 36, Núm. 2 (juliol-desembre 2012) , p. 221-230

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24 p, 224.6 KB

Statistical modelling and forecasting of outstanding liabilities in non-life insurance / Martínez-Miranda, María Dolores (Universidad de Granada. Departamento de Estadística e Investigación Operativa) ; Perch Nielsen, Jens (City University (London). Cass Business School) ; Wüthrich, Mario V. (ETH Zurich, RiskLab. Department of Mathematics)
Non-life insurance companies need to build reserves to meet their claims liability cash flows. They often work with aggregated data. Recently it has been suggested that better statistical properties can be obtained when more aggregated data are available for statistical analysis than just the classical aggregated payments. [...]
2012
SORT : statistics and operations research transactions, Vol. 36, Núm. 2 (juliol-desembre 2012) , p. 195-218

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14 p, 403.0 KB

Hurdle negative binomial regression model with right censored count data / Ehsan Saffari, Seyed (Universiti Teknologi Malaysia. Department of Mathematics, Faculty of Science) ; Adnan, Robiah (Universiti Teknologi Malaysia. Department of Mathematics, Faculty of Science) ; Greene, William (New York University. Department of Economics, Stern School of Business)
A Poisson model typically is assumed for count data. In many cases because of many zeros in the response variable, the mean is not equal to the variance value of the dependent variable. Therefore, the Poisson model is no longer suitable for this kind of data. [...]
2012
SORT : statistics and operations research transactions, juliol-desembre 2012, p. 181-194

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28 p, 632.5 KB

The new class of Kummer beta generalized distributions / Pescim, R. R. (Universidade de Sao Paulo-USP. Departamento de Ciências Exatas) ; Cordeiro, G. M. (Universidade Federal de Pernambuco-UFPE. Departamento de Estatística) ; Demétrio, Clarice Garcia Borges (Universidade de Sao Paulo-USP. Departamento de Ciências Exatas) ; Ortega, Edwin M. M (Universidade de Sao Paulo-USP. Departamento de Ciências Exatas) ; Nadarajah, Saralees (University of Manchester. School of Mathematics)
Ng and Kotz (1995) introduced a distribution that provides greater flexibility to extremes. We define and study a new class of distributions called the Kummer beta generalized family to extend the normal, Weibull, gamma and Gumbel distributions, among several other well-known distributions. [...]
2012
SORT : statistics and operations research transactions, Vol. 36, Núm. 2 (juliol-desembre 2012) , p. 153-180

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14 p, 143.5 KB

A note on the use of supply-use tables in impact analyses / Lenzen, Manfred (The University of Sydney) ; Rueda-Cantuche, José M. (Universidad Pablo de Olavide)
Little attention has so far been paid to the problems inherent in interpreting the meaning of results from standard impact analyses using symmetric input-output tables. Impacts as well as drivers of these impacts must be either of the product type or of the industry type. [...]
2012
SORT : statistics and operations research transactions, Vol. 36, Núm. 2 (juliol-desembre 2012) , p. 139-152

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24 p, 258.4 KB

On developing ridge regression parameters : a graphical investigation / Muniz, Gisela ; Golam Kibria, B. M. ; Mansson, Kristofer ; Shukur, Ghazi
In this paper we review some existing and propose some new estimators for estimating the ridge parameter. All in all 19 different estimators have been studied. The investigation has been carried out using Monte Carlo simulations. [...]
2012
SORT : statistics and operations research transactions, Vol. 36, Núm. 2 (juliol-desembre 2012) , p. 115-138

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