BADGIR is an on-line data archive at the University of Wisconsin - Madison. From this portal you can browse or search data documentation (e.g., metadata, codebooks) and univariate summary statistics (e.g., mean, frequency counts). The database contains documented survey results from various survey-research projects in the US, Central America, and South America. Some historical datasets also (e.g. of slave-trade records).
re3data.org: Better Access to Data for Global Interdisciplinary Research;
editing status 2017-10-05;
re3data.org - Registry of Research Data Repositories. http://doi.org/10.17616/R35G86
last accessed: 2018-11-17