What is Health Services Research?

Legal Definition
Health services research (HSR), also known as health systems research or health policy and systems research (HPSR), is a multidisciplinary scientific field that examines how people get access to health care practitioners and health care services, how much care costs, and what happens to patients as a result of this care. Studies in HSR investigate how social factors, health policy, financing systems, organizational structures and processes, medical technology, and personal behaviors affect access to health care, the quality and cost of health care, and quantity and quality of life. Compared with medical research, HSR is a relatively young science that developed through the bringing together of social science perspectives with the contributions of individuals and institutions engaged in delivering health services.
-- Wikipedia