While there was some electronic book publishing beginning in the 1970s, many of the prominent social science publishers, as well as many university presses, did not begin widespread e-book publishing until the late 1990s, and most continue to publish titles in both print and e-book format. Most government publications are freely available on the Web, as are working papers, policy papers, and reports issued by think tanks, research centers, non- and inter-governmental organizations, etc. One caveat about these materials, however, is that unless they are permanently archived by a library or repository, they are at risk of disappearing without notice.
The majority of published journal literature is available online via a paid subscription, with a gradual increase in Open Access materials, particularly for the social sciences most closely aligned with the sciences. Current newspapers and some historical collections are available electronically, also for purchase. Princeton provides access to fee-based materials through the Library. Open Access repositories such as Cornell’s SocArXiv and SSRN contain journal article preprints, working papers and some published materials.