Do workers underreport morbidity? The accuracy of self-reports of chronic conditions.

We use matched Danish health survey and register data to investigate discrepancies between register-based diagnoses and self-reported morbidity. We hypothesize that false negatives (medical diagnoses existing in the register but not reported in the survey) arise partly because individuals fear career repercussions of being discovered suffering a chronic or severe illness that potentially lowers productivity. We find evidence of substantial underreporting, which is indeed systematically higher for individuals in the labor market.