Miret-Gamundi, Pau; Zueras, Pilar
Centre d'Estudis Demogràfics, Spain
Spanish Social Security System released in 2004 a 4% sample of its registers, including the completed labour biography of the population who were contributing to Social Security for at least one day in that calendar year (_Muestra Continua de Vidas Laborales_; Continuous Sample of Labour Biographies). We presently have that information from 2004 to 2013. It includes data on the month and year of birth and sex, nationality and professional category, among others. By observing changes in the demographic pyramids for this decade we will be able to answer to what extent the age structure of the labour force is ageing in contemporary Spain. This situation has to be due by two factors: a lower and later entry in the labour force (by younger workers), and by a decrease of and a later exit from the labour force (by older workers). Through elaborating the first entrance rate in the system, and the exit from it due to death or retirement, we aim to show the degree of ageing process of the Spanish labour force in the last decade, in order to be able to conclude if ageing is due to demographic causes (less younger people because of low fertility, and more older people because of an increase in longevity), economic context (high unemployment, especially among younger people, and no so high in older people), or cultural values (as the extension in education or the patterns of leaving the labour market, related to the extension of a generous public pension system).