eprintid: 2680 rev_number: 11 eprint_status: archive userid: 69 dir: disk0/00/00/26/80 datestamp: 2015-05-18 15:45:57 lastmod: 2015-11-02 13:13:29 status_changed: 2015-05-18 15:45:57 type: article metadata_visibility: show creators_name: Catini, Roberto creators_name: Karamshuk, Dmytro creators_name: Penner, Orion creators_name: Riccaboni, Massimo creators_id: roberto.catini@imtlucca.it creators_id: dmytro.karamshuk@imtlucca.it creators_id: orion.penner@imtlucca.it creators_id: massimo.riccaboni@imtlucca.it title: Identifying geographic clusters: A network analytic approach ispublished: pub subjects: G1 subjects: QA75 divisions: EIC full_text_status: public keywords: Innovation clusters, Network analysis, Bio-pharmaceutical industry note: Available online May 14, 2015 abstract: In recent years there has been a growing interest in the role of networks and clusters in the global economy. Despite being a popular research topic in economics, sociology and urban studies, geographical clustering of human activity has often been studied by means of predetermined geographical units, such as administrative divisions and metropolitan areas. This approach is intrinsically time invariant and it does not allow one to differentiate between different activities. Our goal in this paper is to present a new methodology for identifying clusters, that can be applied to different empirical settings. We use a graph approach based on k-shell decomposition to analyze world biomedical research clusters based on PubMed scientific publications. We identify research institutions and locate their activities in geographical clusters. Leading areas of scientific production and their top performing research institutions are consistently identified at different geographic scales. date: 2015-11 date_type: published publication: Research Policy volume: 44 number: 9 publisher: Elsevier pagerange: 1749-1762 id_number: 10.1016/j.respol.2015.01.011 refereed: TRUE issn: 0048-7333 official_url: http://www.sciencedirect.com/science/article/pii/S004873331500013X citation: Catini, Roberto and Karamshuk, Dmytro and Penner, Orion and Riccaboni, Massimo Identifying geographic clusters: A network analytic approach. Research Policy, 44 (9). pp. 1749-1762. ISSN 0048-7333 (2015) document_url: http://eprints.imtlucca.it/2680/1/final-preprint.pdf