https://qz.com/1776080/how-the-mcdonnell-douglas-boeing-merger-led-to-the-737-max-crisis
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef20023en.pdf
https://www.imf.org/-/media/Files/Publications/WP/2024/English/wpiea2024001-print-pdf.ashx
https://www.cesifo-group.de/DocDL/ifoDD_18-01_03-09_Ochsner.pdf