Santa Fe Institute

Events News

Science On Screen continues May 8 with Simon DeDeo and 'Sneakers'
April 30, 2013 -

The popular Science On Screen series returns to Santa Fe Wednesday evening, May 8, with Simon DeDeo and the 1992 cult hacker film Sneakers.

Video: How social media might help you survive the next big disaster
March 25, 2013 -

SFI's 2013 Community Lecture series debuted March 14 with UC-Boulder's Leysia Palen describing how victims, observers, and “citizen-responders” are using modern technology to participate in disaster response. Watch ...

Climate scientists James Hansen, at SFI, calls for energy sources to foot their 'true' costs
Feb. 22, 2013 -

Speaking at SFI yesterday, noted climate scientist James Hansen told an overflow crowd that efforts to stem climate change will be ineffectual as long as fossil fuels remain the cheapest ...

SFI's successful crowdfunding campaign will help scientists study indigenous people
Dec. 14, 2012 -

SFI's crowdfunding campaign has reached its goal. The resulting research will help scientists preserve the threatened landscapes on which indigenous human groups depend. 

The Gods Must Be Crazy with Murray Gell-Mann
Dec. 13, 2012 -

The 2012 Science On Screen series in Santa Fe wrapped up December 13 to a full house, with "The Gods Must Be Crazy" and Murray Gell-Mann's distinctive insight and ...

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Diffusion of Microfinance

Colloquium

February 05, 2013
3:30 PM
Noyce Conference Room

Matthew O. Jackson (Department of Economics, Stanford University)

Abstract.  We develop a new, simple model of word-of-mouth diffusion that we then fit to data that we collected in 43 rural villages in Karnataka in southern India. Based on this model we do several things. First, we use it to derive a new measure of how central a given node is in a network: diffusion centrality.   Second, we show that the diffusion centrality of those individuals informed first is a strong and significant predictor of the eventual participation in a microfinance program in these villages.

We also show that this centrality measure significantly outperforms other standard centrality measures, such as degree centrality, betweenness centrality, eigenvector centrality, and Bonacich centrality.  Fitting the model to the village data allows us to (i) infer relative roles of basic information transmission versus other forms of peer influence, and (ii) distinguish information passing by participants and non-participants. We find that participants are significantly more likely to pass information on to friends and acquaintances than informed non-participants. However, information passing by non-participants is still substantial and significant, accounting for roughly one-third of eventual informedness and participation. We also find that, once we have properly conditioned on an individual being informed, her decision to participate is not significantly affected by the participation of her acquaintances.

Purpose: Research Collaboration

SFI Host: Cris Moore

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  • * SFI community lectures are free, open, & accessible to the public.
  • * Seminars & colloquia are geared for scientists but free & open to the interested public.
  • * All other SFI events are by invitation only.
  • * Note: We are unable to accommodate members of the public for SFI's limited lunch service; you're welcome to bring your own.