This is of great benefit to employers, but it places great stress on students, who often must settle for mediocre wages. Conversely, in September, the job market suddenly experiences a labour drought, as all these summer-time employees return to their studies. There would be a natural economic incentive for the student population to disperse its labour supply over all three semesters, since each student has a vested interest in seeking labour during a period of time when as few other students as possible are competing for his job. This will benefit employers, since it will provide them with a steady and relatively constant supply of labour. It will benefit students, since it will mean that they face only one third the competition on the job-market which they presently do.
Some students face time-constraints outside of academic life.
They may have children to take care of. Or there may be some other activity which is sufficiently important to them that they do not wish to compromise it for the sake of their studies. Some students simply want to take less courses during each semester, so that they can focus and concentrate more on each one. A trimester system would give these students greater flexibility in schedulng their time. In a period of increasing fiscal restraint, universities are finding it increasingly difficult to adequately meet the needs of all their students.