Measure of International Authority (MIA)


MIA contains estimates of the authority exercised by 76 international governmental organizations (IOs) in the period from 1950 to 2019. We break down authority into two dimensions delegation, that is, the competences held by independent third parties within the IO, and pooling, that is, deviation from the unanimity or consensus principle in collective member state decision-making bodies and  also estimate the scope of the policies for which an IO is responsible. Scoring is annual and the unit of analysis is the individual IO.


** Please save the file on your hard disk before opening; each data file is a zip file.**

  • MIA-Authority: Annual aggregate scores for delegation and pooling for each IO.
  • Dataset (May 2023)
  • Codebook
  • MIA-Master Data: Annual scores on authority disaggregated by IO body, decision area, decision stage for each IO.
  • Dataset (May 2023)
  • Codebook
  • MIA-Policy: Annual scores for policy scope for each IO.
  • Dataset (May 2023)
  • Codebook

Last updated: 23 May 2023. 

When using the data, please cite: 

  • Liesbet Hooghe, Gary Marks, Tobias Lenz, Jeanine Bezuijen, Besir Ceka, and Svet Derderyan. 2017. Measuring International Authority. Oxford: OUP (pre-publication version).
  • Liesbet Hooghe, Tobias Lenz, and Gary Marks. 2019. A Theory of International Organization. Oxford: OUP (pre-publication version).
  • Yoram Haftel, and Tobias Lenz. 2022. Measuring Institutional Overlap in Global Governance. Review of International Organizations 17(2), 323–347.                                         Cite this piece specifically for the update of delegation and pooling from 2011 to 2019,      and the extension of policy scope for the years 2018 and 2019. 

Research Team

The original MIA dataset (delegation and pooling, 1950-2010; policy scope, 1950-2017) was constructed by Liesbet Hooghe, Gary Marks, Tobias Lenz, Jeanine Bezuijen, Besir Ceka, and Svet Derderyan. This project was funded by the European Union’s Advanced European Research Council grant # 249543 “Causes and Consequences of Multilevel Governance.”

The update of MIA (delegation and pooling, 2011-2019; policy scope, 2018-2019) was undertaken by Tobias Lenz, Yoram Haftel, Dan Eran, Mona Saleh, Liesbet Hooghe, and Gary Marks. This project was funded by the Ministry of Science and Culture of Lower Saxony’s Research Cooperation Lower Saxony – Israel grant.

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.