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  • An empirical evaluation of five small area estimators 

    Costa, Àlex; Satorra, A.; Ventura, Eva (Institut d'Estadística de Catalunya, 2003)
    Article
    Accés obert
    This paper compares five small area estimators. We use Monte Carlo simulation in the context of both artificial and real populations. In addition to the direct and indirect estimators, we consider the optimal composite ...
  • Optimization of touristic distribution netwoorks using genetic algorithms 

    Medina, Josep R.; Yepes, Víctor (Institut d'Estadística de Catalunya, 2003)
    Article
    Accés obert
    The eight basic elements to design genetic algorithms (GA) are described and applied to solve a low demand distribution problem of passengers for a hub airport in Alicante and 30 touristic destinations in Northern Africa ...
  • Indirect inference for survival data 

    Turnbull, Bruce W.; Jiang, Wenxin (Institut d'Estadística de Catalunya, 2003)
    Article
    Accés obert
    In this paper we describe the so-called “indirect” method of inference, originally developed from the econometric literature, and apply it to survival analyses of two data sets with repeated events. This method is often ...
  • Aspects of the analysis of multivariative failure time data 

    Prentice, Ross L.; Kalbfleisch, J. D. (Institut d'Estadística de Catalunya, 2003)
    Article
    Accés obert
    Multivariate failure time data arise in various forms including recurrent event data when individuals are followed to observe the sequence of occurrences of a certain type of event; correlated failure time when an individual ...
  • Survival analysis with coarsely observed covariates 

    Nielsen, Søren Feodor (Institut d'Estadística de Catalunya, 2003)
    Article
    Accés obert
    In this paper we consider analysis of survival data with incomplete covariate information. We model the incomplete covariates as a random coarsening of the complete covariate, and an overview of the theory of coarsening ...
  • A sensitivity analysis for causal parameters in structural proportional hazards models 

    Goetghebeur, E.; Loeys, T. (Institut d'Estadística de Catalunya, 2003)
    Article
    Accés obert
    Deviations from assigned treatment occur often in clinical trials. In such a setting, the traditional intent-to-treat analysis does not measure biological efficacy but rather programmatic effectiveness. For all-or-nothing ...
  • Cumulative processes related to event histories 

    Cook, Richard J.; Lawless, Jerald F.; Lee, Ker-Ai (Institut d'Estadística de Catalunya, 2003)
    Article
    Accés obert
    Costs or benefits which accumulate for individuals over time are of interest in many life history processes. Familiar examples include costs of health care for persons with chronic medical conditions, the payments to insured ...
  • Likelihood for interval-censored observations from multi-state models 

    Commenges, Daniel (Institut d'Estadística de Catalunya, 2003)
    Article
    Accés obert
    We consider the mixed dicrete-continuous pattern of observation in a multi-state model; this is a classical pattern because very often clinical status is assessed at discrete visit times while time of death is observed ...