"The problems to be examined are in large part those which are usually called international, and the law to be examined consists of the rules applicable to these problems.
But the term international is misleading since it suggests that one is concerned only with the relations of one nation (or state) to other nations (or states). The term transnational law includes all law which regulates actions or events that transcend national frontiers. [...] Transnational situations, then, may involve individuals, corporations, states, organisations of states, or other groups."
Philip C. Jessup: Transnational Law, New Haven 1956, p.1 et 2.
From autumn 2014 on we also offer a Certificate in Transnational Law.