Researchers from Swedish universities are looking at the impact of cancelling Elsevier contracts.
Consequences of Sweden Cancelling Elsevier : a presentation at the LIBER 2019 conference (June 27, 2019) by Lisa Olsson, Camila Hertil, Frida Jakobsson, and Lovisa Österlund.
The Surveys used to collect the data were posted by the same authors to figshare on Jan 31, 2019. Links are included to the press release, and FAQ on the cancellation and the assignment.