La recherche est consacrée à l’analyse du régime juridique d’adhésion appliqué par l’UE dans le cas de la Macédoine. L’étude est divisée en deux volets – la stabilisation et l’association –, conformément aux objectifs de la politique du PSA de l’UE envers les États des Balkans occidentaux. En ce qui concerne la politique de stabilisation, sont abordées les modifications constitutionnelles et législatives provenant de l'accord-cadre d'Ohrid – l’élément central du cadre de la conditionnalité d’adhésion à l’UE posé à la Macédoine – ensuite, est recherchée l’application du principe de bon voisinage dans le cas de la Macédoine, notamment en ce qui concerne les divergences avec deux États voisins – le Grèce et la Bulgarie. Le volet association de la thèse est consacré à l’analyse du rapprochement du droit de la Macédoine de l’acquis communautaire en ce qui concerne le droit économique, ainsi que le droit non économique. La thèse vise à combler une lacune dans la littérature existante concernant les relations entre la Macédoine et l'Union européenne. / The research is dedicated to the analysis of the application of the legal regime regulating the enlargement of the European Union toward Macedonia. The work is divided in two parts – the stabilisation and the association –, in accordance to the objectives of the policy of SAP of the UE towards the states of the Western Balkans. The research of the policy of stabilization concerns the constitutional and legislative modifications introduced by the Ohrid Framework Agreement – the central element of the enlargement conditionnality framework imposed on Macedonia –, as well as the application, in the case of Macedonia, of the principle of good neighborliness, in particular the bilateral disputes with its two neighbors – Greece and Bulgaria. The part of the thesis dedicated to the policy of association analyses the rapprochement of the national law of Macedonia to the acquis communautaire in the fields of economic law, as well as the non-economic law. The thesis therefore fills a certain gap in the literature concerning the relations between Macedonia and the European Union.

The thesis seeks to examine the underlying motivations behind the conclusion of the Stability and Association Agreement between European Union and Kosovo on the 27th of October 2015. To determine the role of material interests and shared ideas in the process of concluding the SAA the thesis discusses and applies rationalism and constructivism, both grand theories of international relations. To test the theories and their respective hypotheses identifying the role of the relevant concepts, the research employs a single case study method, using a congruence analysis approach. In conclusion, through the rationalist lens within the perspective of the EU, the thesis confirms the existence of material interest in the conclusion of the SAA, representing security, power and economic gains. To complement the analysis via a constructivist lens within the perspective of Kosovo, the thesis solely implies a limited role of identity and norms while it points out that such constructivist concepts rather impeded the reaching of the SAA, veiling the actual role of material interest.