***** To join INSNA, visit http://www.insna.org ***** Hi Jordi, I've had students ask the same thing, and have been equally at a loss for an answer. Looking for an out, in this paper (https://www.msu.edu/~zpneal/publications/neal-emporg.pdf) I proposed an alternative (I called it gamma-centrality) that yields qualitatively similar results and has a tunable parameter, but never yields negative scores. As an added bonus, the "gamma" parameter doesn't have any restrictions on its range. Best, Zak -- Zachary Neal, PhD Assistant Professor, Department of Psychology & Global Urban Studies Program Editor, Journal of Urban Affairs Michigan State University 316 Physics Road, Rm 262 East Lansing, MI 48824 http://www.msu.edu/~zpneal Twitter: @zpneal On networks - www.routledge.com/books/details/9780415881425/ On system science - www.routledge.com/books/details/9780415843324/ On public space - www.routledge.com/books/details/9780415997270/ On diversity & cohesion - www.youtube.com/watch?v=Az6Uy7p3kas Quoting Jordi Comas <[log in to unmask]>: > ***** To join INSNA, visit http://www.insna.org ***** > > So.... > > I mistakenly told students to "play" with beta parameter of Bonacich > centrality. > > Student:"How can they be negative scores?' > > Me: "I don't know. I'll get back to you. But, we need to keep Beta below > the inverse of largest eignevalue. Sorry about that. Should have told you > that." > > ?Inquisitive student: "I still don't understand how it can return negative > scores."? > > Me: "Not sure. I'll get back to you on that. Another cookie?" (Ok, > Ididn't offer cookies). > > So, can someone help me out? To my eyes, the Bonacich algoritihim sums up > the centrality score of each node by weighting each node. How can and > additive series get a negative score? > > Thanks! > > Jordi > (cookies in the mail for you for good answer. :) ) > > -- > *Jordi Comas* > > > *"There is nothing so practical as a good theory." Kurt Lewin* > Social Innovation and Entrepreneurship Blog (under construction): Simple > Tools. <https://simpletools.blogs.bucknell.edu/> > > Netcentric <http://netcentric.blogs.bucknell.edu/>: Resources for Teaching > Network Theory and Research > > Research and Writing Blog: Nets We Weave <http://netsweweave.wordpress.com> > > > > > > *Assistant ProfessorSchool of ManagementBucknell UniversityTaylor 112570 > 577 3161* > > _____________________________________________________________________ > SOCNET is a service of INSNA, the professional association for social > network researchers (http://www.insna.org). To unsubscribe, send > an email message to [log in to unmask] containing the line > UNSUBSCRIBE SOCNET in the body of the message. > _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.