https://ecipe.org/wp-content/uploads/2023/07/ECI_23_PolicyBrief_08-2023_LY02.pdf
https://blogs.lse.ac.uk/europpblog/2023/06/19/is-differentiated-cooperation-the-way-forward-for-eu-foreign-policy/
https://www.eeas.europa.eu/eeas/china-38th-human-rights-dialogue-european-union-takes-place-brussels_en
https://www.nber.org/papers/w24701.pdf