Source: Younghwan Song, Industrial Relations: A Journal of Economy and Society, Volume 48 Issue 4, Published Online: 24 Aug 2009
From the abstract:
A substantial number of people take work home without a formal payment arrangement. Using the Work Schedules and Work at Home Supplement to the May 2001 Current Population Survey, this paper investigates the determinants of unpaid work at home. Education, lack of overtime rates, being a team leader, efficiency wages, and larger earnings inequality in an occupation are positively related to the prevalence of unpaid work at home. Unpaid work at home appears to be a form of investment made in expectation of a return in the long run.