https://www.mckinsey.com/mgi/our-research/the-complication-of-concentration-in-global-trade
https://www.bruegel.org/sites/default/files/2022-11/WP%2018.pdf
When studying international trade, there were occasional moments when I moved away from mathematical ...
https://www.wto.org/english/res_e/booksp_e/oneyukr_e.pdf