
https://knowledge.wharton.upenn.edu/article/why-are-the-markets-collapsing-how-bad-will-covid-19-really-be/?utm_source=kw_newsletter&utm_medium=email&utm_campaign=2020-03-17

https://www.bakerinstitute.org/media/files/files/ac785a2b/BI-Brief-071817-CES_Russia1.pdf

https://ecipe.org/wp-content/uploads/2025/12/ECI_25_PolicyBrief_20-2025_Openess_LY06.pdf