Occasionally, the statistics you need will be presented in an article. If you can't think of an organization that may have conducted the research, do a keyword search in one of the economic databases. You may want to use one of these terms as a keyword:
Authoritative index to articles in journals, books, dissertations, and working papers in economics. Comprehensive, up-to-date coverage with 1.3 million records from 1886 present.
A full-text scientific databases offering journal articles and book chapters covering scientific, technical, and medical (STM) and social sciences research
A scholarly, multi-disciplinary database providing indexing and abstracts for thousands of journals and other publications. PDF content dates back to 1887.
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