International, federal, and state governments gather and publish statistics about a variety of social, political, and economic conditions. Sometimes they also publish reports that analyze the data. Below are some examples:
International
Federal
State
Academics develop and test hypotheses through surveys, focus groups, etc., analyze the results, and then publish the results in an academic journal. Below are 4 databases that will help you efficiently find books and articles on your topic. Note: if you search in these databases and get overwhelmed with results, refine your keywords, and filter results to articles published in the last 3 years.
Organizations, federally/state-funded or privately-funded, are another source for social science materials. These organizations will publish reports that analyze data to support policy arguments that further the organization's mission. Be wary of bias in these sources (and all sources). Some examples are: