https://www.princeton.edu/~rbenabou/papers/beliefs%20qje%201%20web.pdf
https://www.theguardian.com/world/article/2024/may/30/political-donations-eu-parties-data-european-parliament-elections
https://worldjusticeproject.org/news/wjp-rule-law-index-2023-global-press-release
https://www.ips-journal.eu/index.php?id=340&L=0&tx_news_pi1%5Bnews%5D=3713&tx_news_pi1%5Bcontroller%5D=News&tx_news_pi1%5Baction%5D=detail&cHash=ad69c8ba018780f41c99687150ea1447