Impact of Social Sciences – Wikipedia is significantly amplifying the impact of Open Access publications.

"When you edit Wikipedia to include a claim, you are required to substantiate that edit by referencing a reliable source. According to a recent study, the single biggest predictor of a journal’s appearance in Wikipedia is its impact factor. One of the exciting findings, writes Eamon Duede, is that it appears Wikipedia editors are putting a premium on open access content. When given a choice between journals of similar impact factors, editors are significantly more likely to select the 'open access' option ..."