qualifications and skills in excess of those required at work are still valued in the labour market on average a tertiary graduate who holds a job requiring only an upper secondary qualification will earn less than if he or she were in a job requiring a tertiary qualification but more than an upper secondary graduate in a job requiring upper secondary qualifications based on this information the survey measures the use of a wide range of skills including both informationprocessing skills which are also measured in the direct assessment and generic skills for which only selfreported use at work is available