Agency creation at the European Union (EU) level differs from that at the national one. European regulatory agencies (ERAs) have limited formal powers and separation from other actors, resembling networks rather than stand-alone agencies. ERAs for economic regulation have been created later and in smaller numbers than for social regulation. Using a historical rational analysis, this paper argues that past delegations to other non-majoritarian institutions at the EU and national levels condition the creation of European agencies. The Commission has defended its existing role and powers, accepting ERAs when they aid its strategy to increase its own reach and ensuring that it has many controls over them. When member states have created indepen...