https://www.bruegel.org/wp-content/uploads/2022/02/PC-02.pdf
https://www.instituteforgovernment.org.uk/sites/default/files/publications/International-civil-service-effectiveness-index-July-17.pdf
http://www.ips-journal.eu/regions/europe/article/show/europes-values-wont-defend-themselves-2599/