
https://cerre.eu/wp-content/uploads/2023/06/CERRE_Future-of-Rail-Report_06.06.2023.pdf

https://www.euronews.com/business/2025/05/01/personal-income-tax-rates-in-europe-where-do-workers-pay-the-highest-and-lowest-taxes

https://www.openmarketsinstitute.org/publications/hearings-show-big-tech-underestimating-regulatory-risk-to-investors