title: Friction-cost method as an alternative to the human-capital approach in calculating indirect costs.
authors.forename: Howard
authors.initials: H
authors.lastname: Birnbaum
mesh_terms: D000041:Absenteeism; D017281:Cost of Illness; D003365:Costs and Cost Analysis / Q000379:methods*; D017049:Employer Health Costs; D004651:Employment / Q000191:economics*; D006801:Humans; D007899:Leisure Activities