https://www.ipg-journal.de/interviews/artikel/das-vertrauen-vollstaendig-verloren-2934/
https://www.ecb.europa.eu/stats/accesstofinancesofenterprises/pdf/ecb.safe202005~c4b89a43b9.en.pdf
https://files.taxfoundation.org/20211014170634/International-Tax-Competitiveness-Index-2021.pdf