1. A study of regional variation in workdays lost through accidents
2. There is admittedly little research material available to support such a hypothesis. Some studies have found a relationship between employee morale and accident rates, but the direction of causation is unclear. For a review of the relevant literature see Richer, M., Factors Affecting the Incidence of Accidental Injuries in Manufacturing Industry, Unpublished Ph.D thesis,Birmingham, 1973.