2012: Vol. 36, Núm. 2

Summary

  • On developing ridge regression parameters: a graphical investigation 

    Muniz, Gisela; Golam Kibria, B. M.; Mansson, Kristofer Mansson; Shukur, Ghazi (Institut d'Estadística de Catalunya, 2012)
    Article
    Open Access
    In this paper we review some existing and propose some new est imators for estimating the ridge parameter. All in all 19 different estimators have been stud ied. The investigation has been carried out using Monte Carlo ...

  • A note on the use of supply-use tables in impact analyses 

    Lenzen, Manfred; Rueda-Cantuche, José M. (Institut d'Estadística de Catalunya, 2012)
    Article
    Open Access
    Little attention has so far been paid to the problems inheren t in interpreting the meaning of results from standard impact analyses using symmetric input-outpu t tables. Impacts as well as drivers of these impacts ...

  • The new class of Kummer beta generalized distributions 

    Pescim, R. R.; Cordeiro, G. M.; Demétrio, Clarice G.B.; Ortega, E. M. M.; Nadarajah, Saralees (Institut d'Estadística de Catalunya, 2012)
    Article
    Open Access
    Ng and Kotz (1995) introduced a distribution that provides g reater flexibility to extremes. We define and study a new class of distributions called the Kummer beta generalized family to extend the normal, Weibull, ...

  • Hurdle negative binomial regression model with right censored count data 

    Saffari, Seyed Ehsan; Adnan, Robiah; Greene, William (Institut d'Estadística de Catalunya, 2012)
    Article
    Open Access
    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 ...

  • Statistical modelling and forecasting of outstanding liabilities in non-life insurance 

    Martínez-Miranda, María Dolores; Nielsen, Jens Perch; Wüthrich, Mario V. (Institut d'Estadística de Catalunya, 2012)
    Article
    Open Access
    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 ...

  • Flexible geoadditive survival analysis of non-Hodgkin lymphoma in Peru 

    Flores, Carlos; Rodríguez-Girondo, Mar; Cadarso-Suárez, Carmen; Kneib, Thomas; Gómez Melis, Guadalupe; Casanova, Luís (Institut d'Estadística de Catalunya, 2012)
    Article
    Open Access
    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 ...