SSRN
papers.ssrn.com
The Social Science Research Network — a preprint repository for economics, finance, law, political science, and management where authors post working papers before and after formal peer review.
Why it is useful
The primary place to find economics, finance, and legal research before it appears in journals — and often the most current version afterward. Papers are freely downloadable without a subscription. Because SSRN hosts working papers, you frequently find research that has been updated since journal publication, including responses to criticism. Essential for tracking academic research in business, policy, or finance.