Coordinating Adjudication Processes

57 Pages Posted: 29 Jan 2014

See all articles by Michael Waibel

Michael Waibel

University of Vienna - Faculty of Law

Date Written: January 6, 2014


International investment tribunals, like all other international courts and tribunals, are created equal. This chapter focuses on genuine decisional fragmentation and the coordination of proceedings within the investment treaty regime, i.e. between parallel and subsequent investment arbitrations rather than cross-regime coordination of, for example, investment arbitrations and World Trade Organization (WTO) dispute settlement. Decisional fragmentation refers to divergent rulings in cases that share the same factual matrix. Numerous authors posit that inconsistent decisions are a particular risk in investment arbitration given the lack of internal (e.g. stare decisis) as well as external control mechanisms to ensure uniform arbitral decisions.

The chapter examines what coordination tasks arise in international investment law (IIL), what the stakeholder interests related to these coordination tasks are and how overlapping jurisdictions of investment tribunals can be managed institutionally and procedurally. The distinction between jurisdiction and admissibility is an important element of successfully coordinating parallel investment arbitrations. The major advantage of declaring claims inadmissible is that it allows tribunals to fulfil their jurisdictional mandate – which many investments tribunals are keen to do – while coordinating proceedings through the lever of admissibility. After describing the structural features of IIL, and in particular the absence of stare decisis, Section 2 examines three coordination tasks that arise in IIL: related proceedings, mass claims and derivative shareholder claims.

Keywords: international dispute settlement; parallel proceedings; double recovery; lis pendens; res judicata; shareholder derivative claims; mass claims; shareholder claims for reflective loss

JEL Classification: K33; K41

Suggested Citation

Waibel, Michael, Coordinating Adjudication Processes (January 6, 2014). University of Cambridge Faculty of Law Research Paper No. 6/2014. Available at SSRN: or

Michael Waibel (Contact Author)

University of Vienna - Faculty of Law ( email )

Schottenbastei 10-16
Vienna, A-1010

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