The article addresses the change in administrative structure at the center of the Estonian government during the twenty years of post-communist development. The focus is on three issues of theoretical relevance-the rate of change in the core parts of public administration, the aspired retrenchment of administrative structures, and the combination of national and international forces behind structural change. In analyzing the factors behind Estonian administrative formation, the initial deinstitutionalization of the politico-administrative system appears to be a critical factor for understanding the direction and content of the reforms undertaken.