The study, which was conducted by VitalityHealth, Mercer, the University of Cambridge and RAND Europe, found that productivity varies enormously between industries, with some industries losing almost 27 days of productive time per employee per year, compared to a national average of 23.5 days. Healthcare and financial services lose 26.6 and 24.9 days per employee a year respectively, while high-tech loses just 18.9 days per employee per year.