A great place to find data! Search for articles on your topic of interest, then check the Data and Methods sections to see what data the authors used. Finally determine if the data are available to you.
Fundamental research tool in economics providing bibliographic citations, with selected abstracts, to the international literature on economics since 1969. EconLit topics include economic development, forecasting, and history; fiscal theory; monetary theory and financial institutions; business finance; public finance; and international, labour, health care, managerial, demographic, regional, agricultural, and urban economics, country studies, and government regulations.
"The Integrated Public Use Microdata Series (IPUMS-USA) consists of more than fifty high-precision samples of the American population drawn from fifteen federal censuses and from the American Community Surveys of 2000-2012. Some of these samples have existed for years, and others were created specifically for this database. These samples, which draw on every surviving census from 1850-2000, and the 2000-2012 ACS samples, collectively constitute our richest source of quantitative information on long-term changes in the American population. However, because different investigators created these samples at different times, they employed a wide variety of record layouts, coding schemes, and documentation. This has complicated efforts to use them to study change over time. The IPUMS assigns uniform codes across all the samples and brings relevant documentation into a coherent form to facilitate analysis of social and economic change." -- website.