This report addresses different aspects of the proposed referendum in Catalonia. In chapter one, Profes- sor Yanina Welp analyzes and presents a political sociological perspective on the respective evolutions of the Catalan support for or rejection of independence. This chapter also summarizes the events that led to the demand for a referendum. In chapter two, Professor Nina Caspersen presents a comparative and historical overview of the political context of the demand for independence for Catalonia and draws up a number of scenarios for the future, depending on the outcome of the referendum. In the subse- quent chapter, Professor Matt Qvortrup analyzes when referendums are held and what determines their outcome; as well, he analyzes the legislation governing the conduct of the proposed referendums. He concludes, with some reservations, that the current legislation meets international standards. Finally, Professor Daniel Turp analyzes and assesses the legality of the proposed referendum. Professor Daniel Turp examines the right to decide of the people of Catalonia in light of rules found in international, Eu- ropean, Spanish, Catalan and comparative law.