
Open Access statistics for Iowa Policy Project, United States, covering academic research published from 2000 to 2025.
Open Access statistics for Iowa Policy Project, United States, covering academic research published from 2000 to 2025. Read More.
Open Access Percentage
41%
Total
Publications
491
Total Open
Publications
202
Total
Citations
17K
Open Access
Percentage
41%
Total
Publications
491
Total Open
Publications
202
Total
Citations
17K
Breakdown
Publisher Open
13%
Both
15%
Other Platform Open
13%
Closed
59%
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 45%
62
Hybrid 26%
35
No Guarantees 29%
40
Other Platform Open
Domain 86%
118
Institution 30%
41
Other Internet 2%
3
Preprint 1%
2
Public 1%
1
Other Platform Locations
Name | Platform Type | Publications |
|---|---|---|
PubMed Central | Domain | 118 |
doaj.org OAI-PMH Repository | Institution | 22 |
LA Referencia | Institution | 4 |
Europe PMC | Domain | 4 |
Singapore Management University | Institution | 3 |
DOI | Other Internet | 3 |
aecid.es OAI-PMH Repository | Institution | 3 |
University of Iowa | Institution | 2 |
Office of Scientific and Technical Information | Institution | 2 |
Harvard University | Institution | 2 |