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Event
Blue Globe viewing from space at night with connections between cities
29 May 2026
Webinar: Four definitions to change the world webinar series – Foreseeable relevance

The panel will evaluate current instruments and frameworks, their merits, and their limitations in order to contribute to the development of an exchange of information regime that is inclusive and universal. …
Event
Art card that says "IISD side-event: Tax Dispute Resolution under the UN Conventiokn on Tax"
11 February 2026
Tax Dispute Resolution Under the UN Convention on Tax: Lessons from Investment Arbitration

ICTD Associate Postdoctoral Fellow Frederik Heitmüller will be speaking at a panel about the tax dispute resolution under the UN Framework Convention on International Tax, hosted by the International Institute for Sustainable Development (IISD)….
Event
Vertical shot of the UN headquarters in New York, featuring a row of flags from different countries
6 February 2026 - 7 February 2026
Academic Symposium on the UN Framework Convention on International Tax Cooperation

ICTD Research Director Martin Hearson and Associate Postdoctoral Fellow Frederik Heitmüller will be speaking at the Academic Symposium on the UN Framework Convention on International Tax Cooperation, hosted by the International Tax Program at the NYU School of Law….
Working Paper

Evaluating Kenya’s Experience with International Tax Standards: Adoption, Suitability, and Effectiveness

December 2025
Daisy Ogembo
The UN headquarters in Geneva, Switzerland, flanked by a row of flags of different countries.
November 2025|
Blog

A new era or business as usual? Why the UN Expert Committee on Tax is still relevant

by Florian Dierich

The Committee’s most prominent contribution is the UN Model Tax Convention, which provides model language for the negotiation of bilateral tax treaties. While originally based on the OECD Model, it has increasingly diverged to better reflect the interests of capital-importing states, most notably in its stronger source-based taxing rights….
Partner Publication

The G20’s Crucial Role in an Uncertain Landscape of International Tax Cooperation

November 2025
Suranjali Tandon, Martin Hearson, Frederik Heitmüller & Florian Dierich
Large convening hall with the UN logo at the front
September 2025|
Blog

UN Tax Convention reading list part 1: The UN process and institutional context

by Florian Dierich & Frederik Heitmüller

We have put together this reading list to help navigate the growing literature on the UN Tax Convention, which is thematically divided into three parts: this first part is on the UN process and institutional context….
Policy Brief

Towards a New Solution for Taxing Cross-border Services? Trade-offs in Designing UN Tax Convention Protocol 1

August 2025
Florian Dierich
Event
Art card featuring the text "Next Steps for the UN Convention on Tax: Mapping priorities'
16 July 2025
WEBINAR: Next Steps for the UN Convention on Tax: Mapping Priorities

Countries around the world are losing billions to illicit financial flows, tax avoidance, tax evasion, and…
Research in Brief

The International Tax Regime Complex: Understanding Change in Global Tax Governance

May 2025
Katharina Kuhn, Lucinda Cadzow, Frederik Heitmüller, Martin Hearson & Tovony Randriamanalina
Event
Photo of the facade of the UN headquarters in New York
5 June 2025
Panel: Future of International Tax Governance

The Institute for Austrian and International Tax Law and the Global Tax Policy Centre at the Vienna University of Economics and Business (WU Vienna) are hosting a panel discussion on the “Future of International Tax Governance”, in the context of ongoing negotiations for the UN Framework Convention on International Tax Cooperation (UN Tax Convention)….
A photo of the UN Headquarters in New York with flags of several countries flying high.
March 2025|
Blog

A decision on decision-making and no disputes on dispute resolution: the Organizational Session for UN Tax negotiations

by Frederik Heitmüller

Last month’s organizational session was not a mundane discussion of practical organizational matters. After a new bureau was elected and the dust following the dramatic exit of the United States from the negotiations had settled, most of the energy was spent on a single topic: reaching a compromise on how the negotiating committee would reach its decisions….