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28 p, 891.5 KB

Nonparametric estimation of the probability of default with double smoothing / Peláez, Rebeca (Universidade da Coruña. Departamento de Matemáticas) ; Cao, Ricardo (Universidade da Coruña. Departamento de Matemáticas) ; Vilar, Juan M. (Universidade da Coruña. Departamento de Matemáticas)
In this paper, a general nonparametric estimator of the probability of default is proposed and studied. It is derived from an estimator of the conditional survival function for censored data obtained with a double smoothing, on the covariate and on the variable of interest. [...]
2021 - DOI (Digital Object Identifier)

10.2436/20.8080.02.111
SORT : statistics and operations research transactions, Vol. 45 Núm. 2 (July-December 2021) , p. 93-120 (Articles)

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22 p, 1.1 MB

Modified almost unbiased two-parameter estimator for the Poisson regression model with an application to accident data / Alheety, Mustafa I. (University of Anbar (Irak). Department of Mathematics,College of Education for Pure Sciences) ; Qasim, Muhammad (Jönköping University (Suècia). Department of Economics, Finance and Statistics) ; Månsson, Kristofer (Jönköping University (Suècia). Department of Economics, Finance and Statistics) ; Kibria, B. M. Golam (Florida International University. Department of Mathematics and Statistics)
Due to the large amount of accidents negatively affecting the wellbeing of the survivors and their families, a substantial amount of research is conducted to determine the causes of road accidents. This type of data come in the form of non-negative integers and may be modelled using the Poisson regression model. [...]
2021 - DOI (Digital Object Identifier)

10.2436/20.8080.02.112
SORT : statistics and operations research transactions, Vol. 45 Núm. 2 (July-December 2021) , p. 121-142 (Articles)

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20 p, 572.3 KB

Bayesian hierarchical nonlinear modelling of intra-abdominal volume during pneumoperitoneum for laparoscopic surgery / Calvo, Gabriel (Universitat de València. Departament d'Estadística i Investigació Operativa) ; Armero, Carmen (Universitat de València. Departament d'Estadística i Investigació Operativa) ; Gómez-Rubio, Virgilio (Universidad de Castilla-La Mancha. Departamento de Matemáticas) ; Mazzinari, Guido (Hospital Universitari i Politècnic La Fe (València))
Laparoscopy is an operation carried out in the abdomen through small incisions with visual control by a camera. This technique needs the abdomen to be insufflated with carbon dioxide to obtain a working space for surgical instruments' manipulation. [...]
2021 - DOI (Digital Object Identifier)

10.2436/20.8080.02.113
SORT : statistics and operations research transactions, Vol. 45 Núm. 2 (July-December 2021) , p. 143-162 (Articles)

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18 p, 719.2 KB

Median bilinear models in presence of extreme values / Santolino, Miguel (Universitat de Barcelona. Departament d'Econometria)
Bilinear regression models involving a nonlinear interaction term are applied in many fields (e. g. , Goodman's RC model, Lee-Carter mortality model or CAPM financial model). In many of these contexts data often exhibit extreme values. [...]
2021 - DOI (Digital Object Identifier)

10.2436/20.8080.02.114
SORT : statistics and operations research transactions, Vol. 45 Núm. 2 (July-December 2021) , p. 163-180 (Articles)

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20 p, 583.3 KB

Exponentiated power Maxwell distribution with quantile regression and applications / Gallardo, Diego (Universidad de Atacama, Copiapó (Xile). Departamento de Matemática) ; Gómez, Yolanda (Universidad de Atacama, Copiapó (Xile). Departamento de Matemática) ; Segovia, Francisco A. (Universidad de Atacama, Copiapó (Xile). Departamento de Matemática)
In this paper we introduce an extension of the power Maxwell distribution. We also discuss a reparametrized version of this model applied to quantile regression. Some properties of the model and estimation based on the maximum likelihood estimation method are studied. [...]
2021 - DOI (Digital Object Identifier)

10.2436/20.8080.02.115
SORT : statistics and operations research transactions, Vol. 45 Núm. 2 (July-December 2021) , p. 181-200 (Articles)

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