This comprehensive Research Handbook examines the continuum between private ordering and state regulation in the lex mercatoria, highlighting constancy and change in this dynamic and evolving system in order to offer an in-depth discussion of international commercial contract law. International scholars from a range of jurisdictions and legal cultures across Africa, North America and Europe, dissect a plethora of contract types, including sale, insurance, shipping, credit, negotiable instruments and agency against the backdrop of key legal regimes commonly chosen in international agreements.