David Ridley, PhD, is a health economist and Faculty Director for the Center for Health Sector Management at Duke University. His research focuses on incentives for innovation and quality, as well as pricing, in health care. David was the lead author of two papers that became law. He and his colleagues proposed the Food and Drug Administration (FDA) priority review voucher program which became law in 2007. The vouchers provide incentives for drug development for neglected and rare diseases. The FDA has awarded more than 80 vouchers valued at about $100 million each. David and his colleagues also proposed the Environmental Protection Agency vector expedited review voucher program which became law in 2022.