The Survey of Earned Doctorates. (IMAGE) U.S. National Science Foundation Caption The Survey of Earned Doctorates provides data on the US system of doctoral education. Credit NSF: Adrian Apodaca Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.