Students are typically young, and make up for their lack of experience with the energy to work longer. Not necessarily more productively--I've certainly seen pe

Students are typically young, and make up for their lack of experience with the energy to work longer. Not necessarily more productively--I've certainly seen people with very counter-productive intense study habits that didn't seem to help them much. Long, sustained hours are more of a problem; in the US we routinely overwork doctors to the point of risking deadly error--in part because the standards of long hours during residencies were developed by William Stewart Halsted, a cocaine addict who worked 100+ hours per week.