Pistrakevych O. The institutional system of the European Union: formation and development in terms of enlargement

The current institutional system of the European Union as the basis of European governance. Disclosure of theoretical and methodological bases of formation and development of the institutional system of the European Union and justification opportunities for application of this experience in the process of reforming the national system of public administration in Ukraine. Methods: comparative analysis, historical, systemic-analytical, synthesis. The essence of the formation and development of new institutions of the member states of EU, in particular States of Central and Eastern Europe due to passive and active leverage the EU. Improved scientific approaches to understanding of EU institutions in the implementation of the enlargement policy as a holistic mechanism of European governance. The results are put into practice of public administration.