
Open Access statistics for Center for Assessment, United States, covering academic research published from 2000 to 2025.
Open Access statistics for Center for Assessment, United States, covering academic research published from 2000 to 2025. Read More.
Open Access Percentage
44%
Total
Publications
2.2K
Total Open
Publications
983
Total
Citations
77K
Open Access
Percentage
44%
Total
Publications
2.2K
Total Open
Publications
983
Total
Citations
77K
Breakdown
Publisher Open
18%
Both
19%
Other Platform Open
7%
Closed
56%
Percentage of Open Access over time
Publisher Open
Both
Other Platform Open
Closed
Volume of Open Access over time
Open
Closed
Publisher Open
OA Journal 44%
358
Hybrid 28%
229
No Guarantees 28%
232
Other Platform Open
Domain 57%
336
Institution 56%
330
Other Internet 8%
46
Preprint 6%
34
Public 2%
14
Other Platform Locations
Name | Platform Type | Publications |
|---|---|---|
PubMed Central | Domain | 340 |
doaj.org OAI-PMH Repository | Institution | 169 |
Unknown Repository | Other Internet | 33 |
Europe PMC | Domain | 19 |
DOI | Other Internet | 18 |
National Institute of Informatics | Institution | 16 |
medRxiv | Preprint | 16 |
Harvard University | Institution | 14 |
California Digital Library | Institution | 13 |
Figshare | Public | 12 |