ICPSR maintains and provides access to a vast archive of social science data for research and instruction (over 8,000 discrete studies/surveys with more than 65,000 datasets). As a member of (ICPSR) SHU students, faculty, and staff have access to more than 500,000 files of research in the social sciences.
A wealth of empirical data on the US economy. Lots of long time series. Also links to Alfred (Archival Federal Reserve Economic Data) and other related collections of Fed data, publications and educational resources.