Health economics is a specialized field that applies economic theory and methods to the study of health, healthcare, and related markets. It investigates how scarce resources are allocated and utilized within the health sector, examining the production, consumption, and distribution of health services, the determinants of health outcomes, and the functioning of healthcare systems. Key characteristics include the analysis of efficiency, equity, incentives, and market structures unique to healthcare, with its significance lying in providing a framework for understanding complex issues in health policy, evaluating interventions, and informing decisions related to resource allocation.