The IEP is a founding member of the Brussels-based Trans European Policy Studies Association (TEPSA) and has been a member of the Europäische Bewegung Deutschland (EBD) since 1962. The IEP's quarterly journal integration is published in cooperation with the German section of ECSA, the Arbeitskreis Europäische Integration (AEI). The IEP is a scientific partner of Europa-Union Deutschland, the largest citizens' initiative for Europe in Germany, and of the house parliaments of Pulse of Europe.