https://opportunityinsights.org/wp-content/uploads/2020/05/tracker_paper.pdf
https://www.nber.org/system/files/working_papers/w30028/w30028.pdf
https://fsi.taxjustice.net/PDF/FSI-Rankings.pdf
https://www.ilo.org/wcmsp5/groups/public/@dgreports/@dcomm/documents/briefingnote/wcms_743146.pdf