https://pubs.aeaweb.org/doi/pdfplus/10.1257/jep.34.2.172
https://socialeurope.eu/is-hungary-returning-to-europe
https://www.ips-journal.eu/index.php?id=340&L=0&tx_news_pi1%5Bnews%5D=3569&tx_news_pi1%5Bcontroller%5D=News&tx_news_pi1%5Baction%5D=detail&cHash=d26f1f115fd9e4efe0c4ae0efcba57a2
https://www.ftm.eu/transparency-gap