https://lawliberty.org/forum/free-trades-origin-myth/
https://ecipe.org/wp-content/uploads/2022/05/ECI_22_OccPaper_Defence_04_2022_LY10.pdf
https://ecipe.org/wp-content/uploads/2020/08/ECI_20_PolicyBrief_06_2020_LY06.pdf
https://www.cesifo.org/DocDL/cesifo1_wp7982.pdf