Supply of workers

Is likely to refer to the labor force (q.v.). The concept focuses on worker characteristics, especially their education and training, but also characteristics such as experience (often considered to be correlated with age), physical strength (often considered to be inversely correlated with age), ability to work in teams, etc. Some demographic characteristics are not to be considered in hiring and promotion decisions, but which are studied include gender, race, ethnicity, parental and marital statuses. See also http://www.bls.gov/opub/ils/pdf/opbils38.pdf