| LV | Riga | Rīga Stradiņš University | Rīgas Stradiņa Universitāte | 
        
            | US | Houston | Rice University | Rice University | 
        
            | DE | Essen | Rhineland-Westphalian Economic Research Institute | Rheinisch-Westfälisches Institut für Wirtschaftsforschung e.V. (RWI) | 
        
            | IS | Reykjavik | Reykjavik University | Háskólinn í Reykjavík | 
        
            | ES | Móstoles | Rey Juan Carlos University | Universidad Rey Juan Carlos | 
        
            | UK | London | Resolution Foundation | Resolution Foundation | 
        
            | BE | Brussels | Research Unit, FPS Social Security | Federale Openbare Dienst Sociale Zekerheid | 
        
            | HU | Budapest | Research Unit, Department of Tax Policy and International Taxation, Ministry for National Economy | Kutatási Osztály, Nemzetgazdasági Minisztérium | 
        
            | LU | Luxembourg | Research Unit of STATEC | Unité Etudes et Recherche de l'Institut National de la Statistique et des Études Economiques du Grand-Duché du Luxembourg | 
        
            | PT | Covilha | Research Unit in Business Sciences, University of Beira Interior | Núcleo de Estudos em Ciências Empresariais, Universidade da Beira Interior |