PSE - Paris School of Economics and CEPII have been collaborating for a long time to carry out research projects on economic policies in the international and environmental areas. This collaboration, now structured within the CEPII-PSE Partnership for International and Environmental Policies, takes different forms, notably:
- CEPII’s participation to the University research school EUR - Paris Graduate School of Economics
- the regular collaboration of PSE researchers in the work of the CEPII, as scientific advisers
- joint organization of conferences
- joint participation in European networks, such as the TTIP Innovative Training Network (TTIP-ITN).

Together, PSE and CEPII aim to put academic excellence at the service of understanding major international economic issues, with a particular focus on environmental issues.

• Paris Graduate School of Economics (PgSE) : Paris Graduate School of Economics (PgSE): CEPII is a partner in the project "Paris Graduate School of Economics (PgSE)", led by PSE- Paris School of Economics and selected in the first wave of the call for projects "Écoles Universitaires de Recherche (EUR)" (investments for the future known as PIA3). This program extends the activities of the Labex OSE-Open Economic Science and aims to integrate high-level research and training of excellence.
  
  
• TTIP-ITN (Transatlantic Trade and Investment Partnership - International Training Network) : CEPII and PSE participate jointly in the TTIP Innovative Training Network (TTIP-ITN). The objective of the TTIP Innovative Training Network (TTIP-ITN) is to foster interdisciplinary research into TTIP. The network is an interdisciplinary, intersectoral collaboration pooling world-leading researchers and practitioners from all relevant disciplines of law - EU constitutional, internal market, and external relations law, international trade law, and international law, as well as political science, international relations, business studies, and economics. The Innovative Training Networks (ITN) aim to train a new generation of creative, entrepreneurial and innovative early-stage researchers. Membership: The University of Birmingham, Eidgenoessische Technische Hochschule (ETH) Zuerich, Universita degli Studi di Torino, The University of Nottingham, Ifo Institut, Erasmus Universiteit Rotterdam, Universität Passau, Egmont - Institut Royal des Relations Internationales, German University of Administrative Sciences Speyer, The City University