This article discusses the estimation of a population proportion, using the auxiliary information available, which is incorporated into the estimation procedure by a probit model fit. Three probit regression estimators are considered, using model-based and model-assisted approaches. The theoretical properties of the proposed estimators are derived…

An analysis of the phenomenon of combining work and study amongst university students is made using data obtained from surveys of graduates carried out four years after finishing their degrees. First, the article reviews the evolution of the phenomenon over the last ten years, taking into account the Catalan University Quality Assurance Agency…