August 25, 2009
The Impact of Boundary Spanning Scholarly Publications and Patents
Authors: Xiaolin Shi, me, Belle Tseng, Gavin Clarkson
Human knowledge and innovation are recorded in two media: scholarly publication and patents. These records not only document a new scientific insight or new method developed, but they also carefully cite prior work upon which the innovation is built.
We quantify the impact of information flow across fields using two large citation dataset: one spanning over a century of scholarly work in the natural sciences, social sciences and humanities, and second spanning a quarter century of United States patents.
We find that a publication's citing across disciplines is tied to its subsequent impact. In the case of patents and natural science publications, those that are cited at least once are cited slightly more when they draw on research outside of their area. In contrast, in the social sciences, citing within one's own field tends to be positively correlated with impact.
The paper came out last week. PLoS One has these neat features where readers can rate the article, leave comments in general, or comment on particular parts of the text. So far... nothing. I'm a bit bummed. Either no one has noticed our potentially controversial article, or it's not as controversial as I had assumed.
July 08, 2009
Second Life study in the press and to be presented at EC
Eytan will be presenting our work on Social Influence and the Diffusion of User-Created Content in Second Life this Friday. In the meantime, the study has been getting a bit of geeky press :).
April 08, 2009
my first paper on financial networks
This project was really fun. I got to collaborate with Andrei Kirilenko, Celso Brunetti, Jeff Harris (+ Paul Tsyhura,) at the CFTC (Commodity Futures Trading Commission) on the properties of time series of network metrics on automatically matched brokers trading futures contracts. Way fun. I had never seriously done time series analysis, and admittedly that big fat recently purchased book on the econometrics of financial time series is still sitting around largely unread. But I digress... What's really neat is that you can see the flow of information into the market reflected in the network variables. The methods we developed can hopefully be used in the future to detect market manipulation and such.
Available as a preprint: "On the informational properties of trading networks"
March 30, 2009
Matt Simmons to join NetSI
I'm happy to say that Matt Simmons has decided to enroll at SI as a PhD student (previously he was a masters student here). Over the years, he has worked with Drago Radev on co-author and citation networks, and with Matt Hindman and me on a project to analyze the US code (the federal law) as a network. Hopefully I'll be able to tell you about that project in the next blog post, whenever that may be.
In the meantime, welcome Matt!
P.S. NetSI is the name of my research group: Networks @ SI.
and current members include
- Xiaolin Shi (PhD student)
- Jiang Yang (PhD student)
- Eytan Bakshy (PhD student)
- Nelson Manohar (postdoc)
- Xiao Wei (MSI)
- Umanka Hebbar (MSI)