
https://theconversation.com/us-and-european-economies-depend-heavily-on-immigrants-decades-of-data-reveal-just-how-much-261508

https://www.opendemocracy.net/en/can-europe-make-it/rest-and-west-thoughts-on-brexit-and-migration-part-one/

https://insightcrime.org/wp-content/uploads/2023/06/HGBF-US-Policy-OC-and-Migration-Policy-Brief-InSight-Crime-June-2023-FINAL-ENG.pdf