https://www.brookings.edu/wp-content/uploads/2018/04/es_20180416_digitalcurrencies.pdf
https://www.ipp.eu/wp-content/uploads/2018/10/cepremap-macro-budget2019.pdf
https://www.ecb.europa.eu/press/accounts/2020/html/ecb.mg200409_1~baf4b2ad06.en.html
https://www.socialeurope.eu/sweden-achievements-uncertainty