Curti Gialdino, A. Keywords: Will | Law of contracts | Private international law | Contrats de développement | Mots clefs: Volonté | Droit des obligations | Droit international privé | Economic development agreement | ABSTRACT A. Curti Gialdino, Professor at the Faculty of Law of Perugia, devotes the course to the Will of the Parties in Private International Law and presents a normative basis of psychological connection in the first chapter. He studies the ratio of the conflict rule considering psychological attachment, then the …