@StuDempster @brembs @OA_Button also: we did a study! short answer: Unpaywall users will get #OA for 47% of articles. Much more at https://t.co/1CcEKIU1wy
@invisiblecomma @csarven @CrossrefOrg This is probably the best answer you'll get to this tricky question: https://t.co/4IgzF7SbKU uses crossref DOIs as basis for sample
"The State of OA: A large-scale analysis of the prevalence and impact of Open Access articles" H. Piwowar et al. https://t.co/haFZbBnez2 https://t.co/Wv2sqLVhrI