This paper studies the representativeness of the Continuous Sample of Working Lives (CSWL), a set of anonymized microdata containing information on individuals from Spanish Social Security records. We examine several CSWL waves (2005-2013) and show that it is not representative for the...

This paper proposes a procedure for selecting large subsamples drawn from a large simple random sample that are more representative of the population under study. By means of the so-called constant of proportionality, the procedure seeks to maximize the size of the subsample taken from a...

Spanish Abstract: En este trabajo se examina si los datos sobre pensiones incluidos en la Muestra Continua de Vidas Laborales (MCVL) son válidos para realizar cierto tipo de proyecciones sobre la sostenibilidad del sistema público de pensiones. Se analiza al conjunto de datos de prestaciones...

Spanish Abstract: En este trabajo se propone una metodología basada en la optimización para elegir sub-muestras de gran tamaño extraídas de una muestra aleatoria simple inicial que mejore la representatividad de la población objeto de estudio. El criterio se basa en maximizar el tamaño de...

Spanish Abstract: La Muestra Continua de Vidas Laborales (MCVL) es un conjunto de microdatos individuales anonimizados extraídos de los registros de la Seguridad Social de España. Es una fuente muy valiosa de información utilizada en numerosos estudios sobre Economía laboral y sobre el...

Pearson's chi-square test is widely employed in social and health sciences to analyze categorical data and contingency tables. For the test to be valid, the sample size must be large enough to provide a minimum number of expected elements per category. This paper develops functions for...

The aim of this paper is to examine differences in life expectancy (LE) between self-employed (SE) and paid employee (PE) workers when they become retirement pensioners, looking at levels of pension income using administrative data from Spanish social security records. We draw on the Continuous...

This paper develops an optimization model for selecting a large subsample that improves the representativeness of a simple random sample previously obtained from a population larger than the population of interest. The problem formulation involves convex mixed-integer nonlinear programming...