http://www.morganstanley.com/ideas/global-trade-protectionism
https://www.cesifo.org/DocDL/cesifo1_wp7982.pdf
https://www.bruegel.org/wp-content/uploads/2021/10/Storms-Ahead_AGH_chp6.pdf
https://www.cer.eu/sites/default/files/insight_SL_5.11.19_2.pdf