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11. Comparative Taxation Dataset on 40 Countries and Areas, 1870-2001 Bookmark Format Series - completed
14. Country Memberships in Selected Intergovernmental Organizations and Accession to Selected Regional and Global Treaty Regimes: Global, Country-Year Format, 1955-2010 Bookmark Format Single study
18. COVID-19 Government Response Tracker (University of Oxford - Blavatnik School of Government) Bookmark Format Series - ongoing
19. COVID-19 Pandemic Preparedness - Infection Rate and Infection Fatality Ratio Estimates 2020-2021 Bookmark Format Single study