ARTICLE: The state of OA: a large-scale analysis of the prevalence and impact of Open Access articles https://t.co/fIMNahch8W estimate at least 28% of the scholarly literature is OA & OA articles receive 18% more citations than average
"Accounting for age and discipline, #OA articles receive 18% more citations than average, an effect driven primarily by Green and Hybrid OA." https://t.co/hg61h3vY4v #openaccess