0.2 + 4.5n + 0.3n^2 Percentage loss of productivity where n is the number of hours over 8 per day, for a 5 day week. e.g. for prolonged use of an 11 hour day

0.2 + 4.5n + 0.3n^2 Percentage loss of productivity where n is the number of hours over 8 per day, for a 5 day week. e.g. for prolonged use of an 11 hour day : 0.2 + 4.5 x 3 + 0.3 x 9 = 16% loss of productivity over the whole week. According to the US Bureau of Labour Statistics - Bulletin No. 917 [1] for more info see this research : http://www.weblem.org/upload/OT1.pdf http://www.weblem.org/upload/OT1.pdf [1] https://fraser.stlouisfed.org/scribd/?title_id=4359&filepath=/docs/publications/bls/bls_0917_1948.pdf#scribd-open https://fraser.stlouisfed.org/scribd/?title_id=4359&filepath...