PhD studies hurt mental health, but less than previously feared

We study the mental health of PhD students in Sweden using comprehensive administrative data on prescriptions, specialist care visits, hospitalizations, and causes of death. We find that about 7 % (5 %) of PhD students receive medication or diagnosis for depression (anxiety) in a given year. These prevalence rates are less than one-third of the earlier reported survey-based estimates, and even after adjusting for difference in methodology, 43 % (72 %) of the rates in the literature. Nevertheless, PhD students still fare worse than their peers not pursuing graduate studies. Our difference-in-differences research design attributes all of this health disadvantage to the time in the PhD program. This deterioration suggests doctoral studies causally affect mental health.