Rethinking Hybrid Open Access Labels for Post-Embargo Articles - open ISU

Perfect agreement between the two databases would mean all data points lie on the dotted 45-degree line. Instead, we see a mismatch, especially at the left side of the graph. Some titles that returned low numbers in WoS have a corresponding Dimensions number that is much higher.

[snip]

Based on this analysis and work over the past two weeks, I believe that the Unpaywall designation is incorrect for most of these records. Every record tested here was classified in Unpaywall as Hybrid, but as we saw, the vast majority are in fact Open Archive - only open after the expiration of a 12-month embargo period. This does not match Unpaywall’s own definition of what Hybrid means. Instead, Bronze would be a more accurate categorization.