https://www.fraserinstitute.org/sites/default/files/economic-freedom-of-the-world-2021.pdf
https://www.ifs.org.uk/publications/10302
https://www.mckinsey.com/mgi/our-research/the-complication-of-concentration-in-global-trade
https://ecipe.org/wp-content/uploads/2024/04/ECI_24_PolicyBrief_08-2024_LY05.pdf