Equity is an abstract concept covering philosophical issues such as fairness and social justice, making its definition and measurement very complex. This study attempts to define and measure equity in health status and health care utilization using the equity index of opportunity. The study...

Influenza vaccination could be a cost-effective way to reduce costs in terms of human lives and productivity losses, but low take-up rates and vaccination unintentionally causing moral hazard may decrease its benefits. We ran a natural field experiment in cooperation with a bank in Ecuador,...