Interesting study by Wikimedia Foundation into the availability of Wikipedia's references across different subjects. Sad to see that Chemistry ranks very low, with a high percentage of pay-walled references.
Should also link to the twitter thread:

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@solarchemist Something I've realised recently – chemistry doesn't seem to have any major open access repository. Physics has arXiv, biomedical has PubMed, astronomy has ADS... But chemistry has nothing but a conspicuous absence.

@invaderxan Yeah, that could very well be contributing. This absence is problematic, and ACS (of all orgs) actually launched a chemistry preprint server in late 2016, but I've never heard of it since. In my opinion, a preprint server would be very useful, but some org with open access credibility should probably operate it.

@solarchemist Really? Wow, I actually had no idea. I'm without institutional access right now and ironically, ACS papers are the hardest for me to get copies of.

I wonder how a preprint server could be set up. Even if it's just a chemistry section of arXiv, it would help.

Also, the irony is strong here:

@invaderxan Yep, ACS is also a driving force behind the legal process against Scihub. They are definitely not an example of scholarship in chemistry for the future.
Creating a working preprint server for chemistry should be the easy part, but uptake among chemists is the tricky bit, I reckon.

Exactly. : /
There are deeply ingrained reasons that Chem is the least open in the STEM fields, not just the lack of reputable OA sources (and welp, the systematic access issues sure don't end here). The personal resistance I've seen to open access drives me up a wall.

@GIMcGrew @solarchemist Well that's disappointing. So I guess some kind of cultural push is needed too.

It's jarring to me because most work I've done has been interdisciplinary between chemistry and astronomy – and in astronomy it's unusual for people to *not* put preprints up on arXiv.

@mskblackbelt @invaderxan @GIMcGrew Well, that's great news. I read the FAQ and the Terms, and it seems they are still setting up a governance board for it, but preprints will be published using a CC-BY licence (author's choice), and the preprint service will allow data mining via API (not completely finalised yet). The preprints will even support rudimentary version tracking. This doesn't sound too bad. We should help spread the word!

@solarchemist @mskblackbelt @GIMcGrew Yes, this is good news. I guess we should try and persuade more people to put their preprints online. Anyone got any conferences coming up...?

@solarchemist @bstacey
For Chemistry, the intimate links with the industry (pharmaceutical, pesticides) might be a problem.
Some of my chemist colleagues, at a public University, were our only collaborators who refused to disclose the composition of a collection of chemical compounds used for research in a scientific paper. And they found this 'natural'...

@solarchemist @cosminribo I'm surprised the "closed" fractions for physics and mathematics are so high. We've been doing the online preprint repository thing for 25 years now.

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