As population scientists, most of our data come from large, government-collected or supported surveys or registries. Our members are very involved in developing surveys, testing respondent strategies, and making comparisons across large population surveys. Our scientists also value the ability to compare across sub-groups of the population, time, and countries. Our scientists both contribute towards and consult existing data repositories, including the NIH Common Data Elements (CDE) Repository. For these reasons, we are supportive of the dissemination and use of CDE.