Those who study Roman law don't “collaborate” with other disciplines: they live in them. Romanists who aren't part philologist and social historian don't exist, and without some acquaintance with philosophy and the history of ideas they're just left behind. So they don't talk about "interdisciplinarity." Like the old joke: "What's water?" said the fish. The corollary is that Roman law is the perfect mirror for all manner of studies, and that includes relatively new ones, like the expressive function of law.
Roman Legal Tradition is an open-access journal dedicated to the civilian tradition in ancient medieval and modern law, published by the Ames Foundation and the University of Glasgow School of Law.