--- abstract: "We describe our work in the collection and analysis of massive data describing the connections between participants to online social networks. Alternative approaches to social network data collection are defined and evaluated in practice, against the popular Facebook Web site. Thanks to our ad-hoc, privacy-compliant crawlers, two large samples, comprising millions of connections, have been collected; the data is anonymous and organized as an undirected graph. We describe a set of tools that we developed to analyze specific properties of such social-network graphs, i.e., among others, degree distribution, centrality measures, scaling laws and distribution of friendship.\r\n" altloc: [] chapter: ~ commentary: ~ commref: ~ confdates: ~ conference: "WIMS '11: International Conference on Web Intelligence, Mining and Semantics" confloc: ~ contact_email: ~ creators_id: [] creators_name: - family: Catanese given: Salvatore honourific: '' lineage: '' - family: De Meo given: Pasquale honourific: '' lineage: '' - family: Ferrara given: Emilio honourific: '' lineage: '' - family: Fiumara given: Giacomo honourific: '' lineage: '' - family: Provetti given: Alessandro honourific: '' lineage: '' date: 2011 date_type: published datestamp: 2011-10-01 00:35:08 department: ~ dir: disk0/00/00/76/44 edit_lock_since: ~ edit_lock_until: 0 edit_lock_user: ~ editors_id: [] editors_name: [] eprint_status: archive eprintid: 7644 fileinfo: application/pdf;http://cogprints.org/7644/1/ full_text_status: public importid: ~ institution: ~ isbn: ~ ispublished: pub issn: ~ item_issues_comment: [] item_issues_count: ~ item_issues_description: [] item_issues_id: [] item_issues_reported_by: [] item_issues_resolved_by: [] item_issues_status: [] item_issues_timestamp: [] item_issues_type: [] keywords: ~ lastmod: 2011-10-01 00:35:08 latitude: ~ longitude: ~ metadata_visibility: no_search note: 'ISBN: 978-1-4503-0148-0' number: ~ pagerange: 52:1-52:8 pubdom: TRUE publication: ~ publisher: ACM refereed: TRUE referencetext: ~ relation_type: [] relation_uri: [] reportno: ~ rev_number: 10 series: ~ source: ~ status_changed: 2011-10-01 00:35:08 subjects: - comp-sci-complex-theory - comp-sci-mach-dynam-sys succeeds: ~ suggestions: ~ sword_depositor: ~ sword_slug: ~ thesistype: ~ title: Crawling Facebook for Social Network Analysis Purposes type: confpaper userid: 14714 volume: ~