1. European Commission - DG Joint Research Centre Directorate I Competences - Modelling; Indicators and Impact Evaluation Unit; Via E.Fermi 2749, TP 361 Ispra (VA) I-21027 Italy
2. Department of Economics; Lancaster University Management School; Bailrigg Lancaster LA1 4YX United Kingdom
3. Dipartimento S.G.S.E.S.; Universita' Magna Graecia; Catanzaro Italy
4. Dipartimento di Economia e Management; University of Ferrara; Via Voltapaletto 11 44121 Ferrara Italy
5. IEB Barcelona