Journal Article Labour Supply and Demand, Absenteeism, and Union Behaviourh Get access Ali M. Reza Ali M. Reza University of Pittsburgh Search for other works by this author on: Oxford Academic Google Scholar The Review of Economic Studies, Volume 42, Issue 2, April 1975, Pages 237–247, https://doi.org/10.2307/2296531 Published: 01 April 1975