For years now, I've just been re-using an old <a href="http://ulrichsweb.serialssolutions.com">Ulrich</a>'s estimate of about <b>25,000</b> for the total number of active peer-reviewed journals.<div><br></div><div>
Prompted by a recent query from someone, I've checked again, and -- unless I've made a mistake in my search -- the number now seems to have doubled to <b>55,311</b>.</div><div><br></div><div>The parameters I used to get this figure were (1) Active, (2) Journal, (3) Academic/Scholarly, (4) Refereed/Peer-reviewed, </div>
<div><br></div><div>A further breakdown shows that of these <b>55,311</b> active peer reviewed journals,</div><div><br></div><div><b>23,527</b> (<i><u>43%</u></i>) are available online</div><div><br></div><div><b>9,354</b> (<i><u>17%</u></i>) are indexed in Thomson-Reuters-ISI's Journal Citation reports</div>
<div><br></div><div><b>6,962</b> (<i><u>13%</u></i>) are open access journals (freely available online) (Gold OA, presumably not including Hybrid Gold).</div><div><br></div><div><b>769</b> (<i><u>11%</u></i>) of the 9,354 Thomson-Reuters-ISI-indexed journals are open access journals</div>
<div><br></div><div>--</div><div><br></div><div>According to the last estimate of journals indexed by SHERPA/ROMEO (which does not include all the journals indexed by Ulrichs, but does include most of the top journals indexed by Thomson-Reuters-ISI):</div>
<div><br></div><div><i><u>60%</u></i> of journals recognize the author's right to provide immediate, un-embargoed open access upon self-archiving their final drafts in their institutional repositories.</div><div><br></div>
<div>--</div><div><br></div><div>It would be helpful if others could check and confirm these figures.</div><div><br></div><div>Stevan Harnad</div>