In an earlier article, the authors outline some reasons for the disappointingly small effects of primary health care programs and identified two weak links standing between spending and increased health care. The first was the inability to translate public expenditure on health care into real services due to inherent difficulties of monitoring and controlling the behavior of public employees. The second was the "crowding out" of private markets for health care, markets that exist predominantly at the primary health care level.
This article presents an approach to public policy in health that comes directly from the literature on public economics. It identifies two characteristic market failures in health. The first is the existence of large externalities in the control of many infectious diseases that are mostly addressed by standard public health interventions. The second is the widespread breakdown of insurance markets that leave people exposed to catastrophic financial losses. Other essential considerations in setting priorities in health are the degree to which policies address poverty and inequality and the practicality of implementing policies given limited administrative capacities. Priorities based on these criteria tend to differ substantially from those commonly prescribed by the international community.