Health economics draws together the ideas and tools of various fields of economics including econometrics, public finance, labour market economics, and industrial organization to study the economics of health and health care systems. These are combined with sector-specific institutional knowledge both to study and to contribute policy advice regarding the health sector. Topics are diverse including, for example, tax policy concerning health-related behaviours, payment models for the health workforce, insurance and financing schemes for health care, equity in health and health care, the dynamics of health, and determinants of physical and mental health outcomes.