The study of Comparative Law studies, including its methodological foundations, is a central theme of CIDP's research activity. The diversity of modern Private Law coexists with a growing effort towards its harmonization and unification, which transcends the European space and is instrumental to the free flow of people, goods, services and capital across borders in a globalised economy.
This research line pays special attention to international instruments, particularly the CISG (which came into force in Portugal at the end of 2021), the UNIDROIT Principles on International Commercial Contracts, the Principles of European Contract Law and other relevant normative acts from the European Parliament and from the Council, which aim to approximate national legal systems in the field of Private Law.
The processes of harmonisation and unification of Private International Law – taken here as the discipline that regulates the international jurisdiction of courts, the determination of the law applicable to cross-border relationships, international judicial cooperation and the recognition of foreign judgments – are also a subject matter of this research line. In Europe and worldwide, Private International Law has known an intense movement towards its harmonisation over the past decades, which has been carried out in particular through European regulations and international conventions, such as the Hague Convention on the Recognition and Enforcement of Foreign Judgments in Civil and Commercial Matters, in force since 2023.
This research line seeks to study these processes in depth, and in particular their impact over the Portuguese legal system, where rules of Private International Law from domestic, European and international sources coexist, which are not always easy to combine.
In the context of this research line, particular attention will also be devoted to the legal systems of other Portuguese-speaking countries, which maintain a fundamental unity with Portuguese law. To this end, a permanent Lusophone Law Observatory will be set up, and the results of its work will be published internationally.
Associated Projects