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In this paper models for claim frequency and claim size in non-life insurance are considered. Both covariates and spatial random effects are included allowing the modelling of a spatial dependency pattern. We assume a Poisson model for the number of claims, while claim size is modelled using a...
Persistent link: https://www.econbiz.de/10010266163
The multinomial logit model (MNL) is one of the most frequently used statistical models in marketing applications. It allows to relate an unordered categorical response variable, for example representing the choice of a brand, to a vector of covariates such as the price of the brand or variables...
Persistent link: https://www.econbiz.de/10010266196
Bayes' statistical rule remains the status quo formodeling belief updating in both normative and descriptive models of behavior under uncertainty. Some recent research has questioned the use of Bayes' rule in descriptive models of behavior, presenting evidence that people overweight 'good news'...
Persistent link: https://www.econbiz.de/10012141876
based on the ideas of mixed models. Specifically, we propose a semiparametric mixed model with boosting to recover the …
Persistent link: https://www.econbiz.de/10010266159
inequality constraints on basis coefficients by boosting techniques. Therefore, recently developed componentwise boosting methods …
Persistent link: https://www.econbiz.de/10010266176
of the penalized estimator, which is based on a new boosting method, allows to select variables. Real world data and …
Persistent link: https://www.econbiz.de/10010266210
variables and the problems of selection of smoothing parameters. Generalized additive model boosting circumvents these problems …
Persistent link: https://www.econbiz.de/10010266217
of estimates. The present paper investigates several approaches to combining ridge regression with boosting techniques … the usual ridge estimator. In partial boosting only part of the regression parameters are reestimated within one step of … continuous response variables as well as in the case of generalized linear models. In a simulation study boosting procedures for …
Persistent link: https://www.econbiz.de/10010266233
is likelihood based boosting. Boosting originates in the machine learning community where it has been proposed as a … technique to improve classification procedures by combining estimates with reweighted observations. Likelihood based boosting is … a general method which may be seen as an extension of L2 boost. In additive mixed models the advantage of boosting …
Persistent link: https://www.econbiz.de/10010266248
A new method for testing linear restrictions in linear regression models is suggested. It allows to validate the linear restriction, up to a specified approximation error and with a specified error probability. The test relies on asymptotic normality of the test statistic, and therefore...
Persistent link: https://www.econbiz.de/10010266181