
https://www.nuffieldtrust.org.uk/files/2022-09/1662995727-nuffield-trust-new-horizons-web.pdf

https://www.economiesuisse.ch/de/artikel/die-praemien-sind-zu-35-prozent-einkommensabhaengig

https://www.wilsoncenter.org/blog-post/helmut-kohl-collection-new-resource-post-cold-war-history