How did pension systems in CEE changed over the past decades? What explains the variation in reform choices between political regimes in the region? Why some countries have chosen to introduce mandatory private accounts whereas others have opted only for parametric reforms? This dissertation answers these questions arguing that the compromises forged between national elites and international actors around key institutional elements of pension systems explain the growing diversity in welfare state pathways in CEE. In particular, it shows that whereas International Financial Institutions (IFIs) such as the World Bank have prioritized parametric adjustments aimed at ensuring the long-term fiscal sustainability of public pension systems togethe...