https://www.socialeurope.eu/2017/07/poland-after-trump/
https://pubs.aeaweb.org/doi/pdfplus/10.1257/jep.37.1.3
https://www.politico.eu/article/eu-warn-financial-risk-andorra-monaco-san-marino/
https://blogs.lse.ac.uk/europpblog/2022/10/10/understanding-the-role-of-joint-bodies-in-eu-external-relations/