https://www.socialeurope.eu/2017/07/european-welfare-states-perform/
https://www.brookings.edu/research/a-post-american-europe-and-the-future-of-u-s-strategy/
https://www.imk-boeckler.de/download-proxy-for-faust/download-pdf?url=http%3A%2F%2F217.89.182.78%3A451%2Fabfrage_digi.fau%2Fp_imk_report_159e_2020.pdf%3Fprj%3Dhbs-abfrage%26ab_dm%3D1%26ab_zeig%3D8946%26ab_diginr%3D8482
http://www.ebrd.com/news/events/ebrd-transition-report-201718.html