School leavers should not accept underqualified jobs

Research at Ghent University shows that school leavers should be patient and selective when looking for a job.
If someone has been looking out for a job for two months refuses a job below his qualifications, he tends to get an offer for a job that matches his qualifications within a month.
If the same person accepts the underqualified job, it tends to take 10 years before he gets a job (and salary- at this level.
The longer one searches for work, the more he should be ready to accept other jobs. Applicants that have been searching for a year, have a less than 50% chance of finding a job at  their level within the next year.