BLS is part of the U.S. Department of Labor and is the federal government’s principal data-gathering agency in the field of labor economics, particularly with respect to the collection and analysis of data on the labor force, employment and unemployment, hours of work, wages and other compensation, prices, living conditions, labor-management relations, productivity, technological developments, occupational safety and health, etc. Practically all of the data BLS collects are supplied voluntarily by workers, businesses, and government agencies.