2014: Vol. 38, Núm. 2
Summary
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Stochastic cash flows modelled by homogeneous and non-homogeneous discrete time backward semi-Markov reward processes
(Institut d'Estadística de Catalunya, 2014-12)
Article
Open AccessThe main aim of this paper is to give a systematization on the stochastic cash flows evolution. The tools that are used for this purpose are discrete time semi-Markov reward processes. The paper is directed not only to ... -
Assessing the impact of early detection biases on breast cancer survival of Catalan women
(Institut d'Estadística de Catalunya, 2014-12)
Article
Open AccessSurvival estimates for women with screen-detected breast cancer are affected by biases specific to early detection. Lead-time bias occurs due to the advance of diagnosis, and length-sampling bias because tumors detected ... -
Estimators for the parameter mean of Morgenstern type bivariate generalized exponential distribution using ranked set sampling
(Institut d'Estadística de Catalunya, 2014-12)
Article
Open AccessIn situations where the sampling units in a study can be more easily ranked based on the measurement of an auxiliary variable, ranked set sampling provides unbiased estimators for the mean of a population that are more ... -
Integrating network design and frequency setting in public transportation networks: a survey
(Institut d'Estadística de Catalunya, 2014-12)
Article
Open AccessThis work reviews the literature on models which integrate the network design and the frequency setting phases in public transportation networks. These two phases determine to a large extent the service for the passengers ... -
An extension of the slash-elliptical distribution
(Institut d'Estadística de Catalunya, 2014-12-04)
Article
Open AccessThis paper introduces an extension of the slash-elliptical distribution. This new distribution is generated as the quotient between two independent random variables, one from the elliptical family (numerator) and the other ... -
New approaches in the chemometric analysis of infrared spectra of extra-virgin olive oils
(Institut d'Estadística de Catalunya, 2014-12)
Article
Open AccessThe aim of this paper is to apply new chemometric approaches to obtain quantitative information from near and mid infrared spectra of Andalusian extra-virgin olive oils, using gas chromatography as a classical reference ... -
Exact prediction intervals for future current records and record range from any continuous distribution
(Institut d'Estadística de Catalunya, 2014-12)
Article
Open AccessIn this paper, a general method for predicting future lower and upper current records and record range from any arbitrary continuous distribution is proposed. Two pivotal statistics with the same explicit distribution for ... -
Balancing properties. A need for the application of propensity score methods in estimation of treatment effects
(Institut d'Estadística de Catalunya, 2014-12)
Article
Open AccessThere has been recently a striking increase in the use of propensity score methods in health sciences research as a tool to adjust for selection bias in making causal inferences from observational controlled studies. ... -
Untangling the influence of several contextual variables on the respondents‘lexical choices. A statistical approach
(Institut d'Estadística de Catalunya, 2014-12)
Article
Open AccessThis work proposes an original textual statistical method to uncover the relationships between opinions, expressed as free-text answers, and respondents’ characteristics. This method also identifies the specific links ... -
Global hypothesis test to compare the likelihood ratios of multiple binary diagnostic tests with ignorable missing data
(Institut d'Estadística de Catalunya, 2014-12)
Article
Open AccessIn this article, a global hypothesis test is studied to simultaneously compare the likelihood ratios of multiple binary diagnostic tests when in the presence of partial disease verification the missing data mechanism is ...
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