title: Local influence in comparative calibration models under elliptical t-distributions.
abstract: In this paper we consider applications of local influence (Cook, 1986) to evaluate small perturbations in the model or data set in the context of structural comparative calibration (Bolfarine and Galea, 1995) assuming that the measurements obtained follow a multivariate elliptical distribution. Different perturbation schemes are investigated and an application is considered to a real data set, using the elliptical t-distribution.
authors.affiliation: Departamento de Estadística, Universidad de Valparaíso, Casilla 5030, Valparaíso, Chile. manuel.galea@uv.cl
authors.forename: Manuel
authors.initials: M
authors.lastname: Galea
authors.forename: Heleno
authors.initials: H
authors.lastname: Bolfarine
authors.forename: Filidor
authors.initials: F
authors.lastname: Vilca
mesh_terms: D000704:Analysis of Variance; D002138:Calibration; D006801:Humans; D016013:Likelihood Functions; D015233:Models, Statistical; D015588:Observer Variation; D018401:Sample Size; D014797:Vital Capacity