DescriptionThis dissertation examines the factors that drive variation in anti-corruption performance in the new EU member states from Central and Eastern Europe after EU accession. By employing a mixed-method approach, it (a) identifies and compares the institutional weaknesses that allow abuse of power in the executive and the legislature, and (b) analyzes how domestic control and oversight mechanisms help contain corrupt practices after accession (with a particular focus on the judiciary and prosecution). The study concludes that differences in designs of anti-corruption institutions that allow or constrain abuse of decision-making power in tandem with an independent, non-politicized judiciary explain variation in post-accession control of corruption.