G. E. Atzeni and Concu, N. , “Tutela ambientale e sviluppo turistico secondo i residenti ad Alghero”, in L'estate al mare, L. Punzo and Usai, S. , Eds. McGraw-Hill, 2007.

R. Brau, E, A. , and Vici, L. , “Una finestra sul mare. Un'analisi interdestinazioni su residenti e turisti”, S. Usai and Punzo, L. , Eds. MILANO: McGraw-Hill, 2007, pp. 111 - 130.

R. Paci and Usai, S. , “Agglomeration economies and growth. The case of Italian local labour systems, 1991-2001”. 2006.

R. Paci and Usai, S. , “Agglomeration economies and growth-The case of Italian local labour systems, 1991-2001”. 2006.

S. Usai and Paci, R. , “The Changing Economic Geography of globalisation”, G. Vertova, Ed. OXON: routledge, 2006, pp. 166 - 191.

R. Paci and Usai, S. , “THE CHANGING ECONOMIC GEOGRAPHY OF GLOBALIZATION”, G. Vertova, Ed. LONDON: ROUTLEDGE, 2006, pp. 166 - 191.

B. Dettori, Paci, R. , and Usai, S. , “Economic cooperation among the countries in the Mediterranean Area”, in Economic cooperation among the countries in the Mediterranean Area, A. Eds, Giovannetti, B. , and Elsheikh, M. S. , Eds. University of Florence, 2006.

M. O. R. E. N. O. R SERRANO, Paci, R. , and Usai, S. , “Importancia de la proximidad geografica y tecnologica en la difusion de la innovacion: las regiones europeas”, PAPELES DE ECONOMIA ESPANOLA, vol. 107, pp. 96–114, 2006.

R. Serrano, Paci, R. , and Usai, S. , “Importancia de la proximidad geografica y tecnologica en la difusion de la innovacion: las regiones europeas”, PAPELES DE ECONOMIA ESPANOLA, vol. 107, pp. 96 - 114, 2006.

S. Usai and Paci, R. , “Innovation Clusters in the European Regions”, EUROPEAN PLANNING STUDIES, vol. 14, pp. 1235 - 1263, 2006.

R. Serrano, Paci, R. , and Usai, S. , “Innovation clusters in the European regions”, EUROPEAN PLANNING STUDIES, vol. 14, 9, pp. 1235 - 1263, 2006.

M. O. R. E. N. O. R SERRANO, Paci, R. , and Usai, S. , “Innovation clusters in the European regions”, EUROPEAN PLANNING STUDIES, vol. 14, pp. 1235–1263, 2006.

B. Dettori, Paci, R. , and Usai, S. , “Technological activity in the European regions”, in Economic Cooperation among the Countries in the Mediterranean Area, University of Florence, 2006.

S. Usai and Vannini, M. , “Banking structure and regional economic growth: lesson from Italy”, THE ANNALS OF REGIONAL SCIENCE, vol. 39, pp. 691–714, 2005.

S. Usai and Vannini, M. , “Banking structure and regional economic growth: lesson from Italy”, ANNALS OF REGIONAL SCIENCE, vol. 39, pp. 691 - 714, 2005.

S. Usai and Vannini, M. , “Banking structure and regional economic growth: lessons from Italy”, THE ANNALS OF REGIONAL SCIENCE, vol. 4, pp. 1–24, 2005.

S. Usai, “Discussion on Cross Country Differences in Patent Propensity a Firm-Level Investigation”, GIORNALE DEGLI ECONOMISTI E ANNALI DI ECONOMIA, vol. 64, 2005.

S. Usai, “Discussion on Cross Country Differences in Patent Propensity a Firm-Level Investigation”, GIORNALE DEGLI ECONOMISTI E ANNALI DI ECONOMIA, vol. 64, 2005.

R. Moreno, Paci, R. , and Usai, S. , “Geographical and sectoral clusters of innovation in Europe”, THE ANNALS OF REGIONAL SCIENCE, vol. 39, pp. 715–739, 2005.

S. Usai, Serrano, R. , and Paci, R. , “Geographical and sectoral clusters of innovation in Europe”, ANNALS OF REGIONAL SCIENCE, vol. 39, pp. 715 - 740, 2005.

R. Serrano, Paci, R. , and Usai, S. , “Geographical and sectoral clusters of innovation in Europe”, ANNALS OF REGIONAL SCIENCE, vol. 39, pp. 715 - 739, 2005.

R. Serrano, Paci, R. , and Usai, S. , “Innovation Clusters in the European Regions”. 2005.

S. Usai, Paci, R. , and Moreno, R. , “Spatial spillovers and innovation activity in European regions”, ENVIRONMENT AND PLANNING A, vol. 37, pp. 1793–1812, 2005.

S. Usai, Paci, R. , and Serrano, R. , “Spatial spillovers and innovation activity in European regions”, ENVIRONMENT AND PLANNING A, vol. 37, pp. 1793 - 1812, 2005.

R. Serrano, Paci, R. , and Usai, S. , “Spatial spillovers and innovation activity in European Regions”, ENVIRONMENT AND PLANNING A, vol. 37, pp. 1793 - 1812, 2005.

B. Dettori, Paci, R. , and Usai, S. , “Technological activity in the european regions”. 2005.

M. Vannini and Usai, S. , “Banking structure and regional economic growth: lessons from Italy”, vol. 2004. CRENoS-CUEC, Cagliari, 2004.

S. Usai and Vannini, M. , “Banking structure and Regional Economic Growth: lessons from Italy”. 2004.

S. Usai and Cao, D. , “Economia del turismo in Sardegna”. CUEC Editrice, CAGLIARI, 2004.

R. Serrano, Paci, R. , and Usai, S. , “Geographical and sectoral clusters of innovation in Europe”. 2004.

D. Cao and Usai, S. , “Il quadro macroeconomico del sistema locale di Cagliari”, in Cagliari tra passato e futuro, 2004.

S. Usai and Paci, R. , “European Regional Growth”, B. Fingleton, Ed. SPRINGER, 2003.

S. Usai, Antonelli, C. , and Marchionatti, R. , “Productivity and External Knowledge. The Italian Case”, RIVISTA INTERNAZIONALE DI SCIENZE ECONOMICHE E COMMERCIALI, 2003.

R. Serrano, Paci, R. , and Usai, S. , “Spatial distribution of innovation activity. The case of European regions”. 2003.

S. Usai, “Territorio e progetto. Prospettive di ricerca orientate in senso ambientale”, G. Maciocco and Pittaluga, P. , Eds. MILANO: FRANCO ANGELI, 2003.

S. Usai and Paci, R. , “European Regional Growth”, B. Fingleton, Ed. SPRINGER VERLAG, 2002.

S. Usai and Paci, R. , “Externalities and local economic growth in manufacturing industries”, in European Regional Growth, SPRINGER VERLAG, 2002.

S. Pitzalis and Brau, R. , “L'ultima Spiaggia”, R. Paci and Usai, S. , Eds. CAGLIARI: CUEC, 2002, pp. 87 - 119.

R. Paci and Usai, S. , “L'ultima spiaggia. Turismo, sostenibilità ambientale e crescita economica in Sardegna”. CUEC Editrice, CAGLIARI, 2002.

R. Paci and Usai, S. , Eds., “L'ultima spiaggia. Turismo, sostenibilità ambientale e crescita economica in Sardegna.”. CUEC, CAGLIARI, 2002.

S. Deidda, Paci, R. , and Usai, S. , “Spatial externalities and local economic growth,”. 2002.

S. Deidda, Paci, R. , and Usai, S. , “Spatial Externalities and Local Economic Growth”. 2002.

R. Paci and Usai, S. , “Externalities and local economic growth in manufacturing industries”. 2001.

S. Usai and Paci, R. , “ULTIMA SPIAGGIA, Turismo, sostenibilità ambientale e crescita in Sardegna”. 2001.

S. Usai and Paci, R. , ULTIMA SPIAGGIA, Turismo, sostenibilità ambientale e crescita in Sardegna. CAGLIARI: CUEC, 2001.

S. Usai and Paci, R. , “Externalities, Knowledge Spillovers and the Spatial Distribution of Innovation”, GEOJOURNAL, vol. 52, 2000.

R. Paci and Usai, S. , “Externalities, knowledge spillovers and the spatial distribution of innovation”. 2000.

C. Antonelli, Marchionatti, R. , and Usai, S. , “Productivity and External Knowledge: The Italian Case”. 2000.

R. Paci and Usai, S. , “The role of specialisation and diversity externalities in the agglomeration of innovative activities”, RIVISTA ITALIANA DEGLI ECONOMISTI, vol. 5, pp. 237 - 268, 2000.

S. Usai and Paci, R. , “The Role of Specialisation and Diversity Externalities in the Agglomeration of Innovative Activities”, RIVISTA ITALIANA DEGLI ECONOMISTI, vol. 2, pp. 237 - 268, 2000.