International Arbitration Quantum & Damages Expert Witness
ICC, LCIA, ICSID, and UNCITRAL quantum experts for cross-border disputes
International arbitration requires damages experts comfortable with ICC, LCIA, ICSID, UNCITRAL, and ad hoc rules, alongside substantive damages law that may be English law, civil law, or international investment law. Investment treaty claims apply the Chorzów Factory full reparation standard, quantifying expropriation through fair market value and regulatory breaches through discounted cash flow and lost profits models subject to rigorous tribunal scrutiny.
Commercial arbitration quantum follows but-for and lost profits methodology adapted to the governing law of the contract and seat of arbitration. Experts prepare reports compliant with IBA Rules on Evidence, respond to tribunal-appointed expert procedures under Article 6, and participate in hot-tubbing and witness conferencing where party experts are examined concurrently. Currency conversion, taxes, and interest require explicit treatment consistent with the applicable law and any bilateral investment treaty provisions.
UK-based quantum economists and forensic accountants are frequently instructed by English solicitors acting in international matters, bringing familiarity with common law damages principles and civil law concepts where tribunals apply mixed legal frameworks. Early engagement on valuation methodology, document production, and model assumptions reduces procedural disputes and strengthens the credibility of quantum evidence before the tribunal.
Related Case Types
Frequently Asked Questions
How does damages quantification differ in international arbitration?
International arbitration damages follow the substantive law governing the dispute - which may be English law, civil law, or international law (for investment treaty cases). In investment treaty arbitration, the full reparation standard from Chorzów Factory [1928] applies - restoring the claimant to the position it would have been in absent the breach, often using fair market value or DCF methodology.
What is the IBA Rules on Evidence approach to expert witnesses?
The IBA Rules on Evidence (Article 5) allow each party to submit expert reports, with the tribunal having discretion to direct a tribunal-appointed expert under Article 6. Party experts and tribunal experts may be examined at the same hearing - known as "hot-tubbing" or witness conferencing - a procedure common in international arbitration.
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