MIT Press releases Direct to Open impact report | MIT News | Massachusetts Institute of Technology

"Open-access monographs receive significantly more use and citations than non-open counterparts, and are more successful at reaching audiences beyond academia....

To date, D2O has funded 240 books: 159 in the humanities and social sciences (HSS) and 81 in science, technology, engineering, art/design, and mathematics (STEAM). The data show that, on average, open-access HSS books in the program are used 3.75 times more and receive 21 percent more citations than their paywalled counterparts. Open-access books in STEAM fields are used 2.67 times more and receive 15 percent more citations than their non-open counterparts, on average. Regardless of their field, D2O books are making meaningful contributions to debates both within and beyond the academy...."