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Last updated: December 19, 2021. ** Please save the file on your hard disk before opening; each data file is a zip file.**

Welcome! The Measure of International Authority (MIA) estimates the authority exercised by international organizations through delegation and pooling (1950-2019). It also estimates the range of policies for which an IO is responsible (1950-2017). We are working to update both datasets through 2020. This release covers 76 international organizations. All scoring is annual; the unit of analysis is the individual IO.

Annual aggregate scores for delegation and pooling for each IO.
Data || Codebook


Annual scores on authority disaggregated by IO body, decision area, decision stage for each IO.
Data || Codebook


Annual scores for policy scope for each IO.                
|| Codebook 









When using the data, please cite:

Research Team

MIA v.1 (1950-2010)Liesbet Hooghe, Gary Marks, Tobias Lenz, Jeanine Bezuijen, Besir Ceka, Svet Derderyan

MIA v.2 (1950-2019): Tobias Lenz, Yoram Haftel, Liesbet Hooghe, Gary Marks, Dan Eran, Mona Saleh

With thanks to the people who have provided valuable research assistance over the years — Max Boiten, Kyle Chan, Jan Dorsten, Alaya Ehrlich, Avigaelle Halevi, Zak Merdi, Benjamin Neudorfer, Rick Scholten, Sydney Rehder, Kai Stern, and Emily Venturi.

MIA v.1 research was funded by the European Union’s Advanced European Research Council grant # 249543 “Causes and Consequences of Multilevel Governance,” and MIA v.2 research was funded by the Ministry of Science and Culture of Lower Saxony’s Research Cooperation Lower Saxony – Israel grant, and by the Kenan and Burton Craige Foundations at the University of North Carolina at Chapel Hill.

For data queries please contact or


Profile explaining the coding for each IO [under construction] 

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Detailed coding for each IO [excel file] 

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