ABSTRACT
Background One of the most notable changes in the working population is its ageing. e baby boom cohorts born after the Second World War (born between 1945 and 1965) are now middle-aged; the oldest of them have already started retiring. At the same time, lower birth rates in the past few decades imply that fewer young people will be entering the labour market [1]. ese demographic changes are bringing about a shift in the ratio of workers to retirees that will lead to a relative shortage of active workers.
