https://www.nber.org/papers/w24701.pdf
https://www.propublica.org/article/honorary-consuls-shadow-diplomatic-immunity-investigation?utm_source=sailthru&utm_medium=email&utm_campaign=majorinvestigations&utm_content=feature
https://publications.parliament.uk/pa/ld201719/ldselect/ldintrel/53/53.pdf
https://voxeu.org/system/files/epublication/Revising_Multilateralism.pdf