There is a very interesting piece in the New York Times today by David Leonhardt on the apparent backlash against prediction markets such as Intrade and Betfair. In principle, these markets make predictions by aggregating the disparate information of many independent bettors who offer prices for a particular outcome. Prediction markets have enjoyed a fair [...]
Why the Prediction Market Failed to Predict the Supreme Court
July 8th, 2012 · No Comments
Tags: Social Network Analysis
New Grant, Post-Doc Opportunity
August 18th, 2011 · 3 Comments
Biological and Human Dimensions of Primate Retroviral Transmission One of the great enduring mysteries in disease ecology is the timing of the AIDS pandemic. AIDS emerged as a clinical entity in the late 1970s, but HIV-1, the retrovirus that causes pandemic AIDS, entered the human population from wild primates many decades earlier, probably near the [...]
Tags: Human Ecology · Infectious Disease · Primates · Social Network Analysis
Nearly Neutral Networks and Holey Adaptive Landscapes
December 29th, 2008 · 2 Comments
My holiday reading on modularity has led me into some of the literature on the evolution of complexity. Some of the most interesting work in theoretical biology that I’ve read in a while relates to the ideas of nearly neutral networks and holey adaptive landscapes, an area developed by Sergey Gavrilets at the University of [...]
Tags: Evolution · R · Social Network Analysis
Plotting Networks in R
December 11th, 2008 · 1 Comment
Using the network package, you can plot graphs in a flexible and powerful way. Often, when plotting a network, we want to vary the color, size, or shape of the vertices based on some attributes. Let's say that we have a freewheeling sexual network (easier to simulate) and we would like to color the vertices [...]
Tags: R · Social Network Analysis
Extracting adjacency matrices with valued edges
September 12th, 2008 · No Comments
This may seem obvious to an expert statnet user, but it took me a bit of careful reading of Carter's paper and some trial and error to figure it out. We are using the frequency of behaviors based on ethological observations as edge weights and would like to be able to extract a matrix of [...]
Tags: R · Social Network Analysis
Extracting an edge list from a network object
September 11th, 2008 · 4 Comments
I've been using the statnet suite of tools a lot recently. As with any powerful software, there is quite a learning curve. I will write some notes in my blog to help me remember tricks that I learn along the way. And who knows? They might even be useful to other people! For a variety [...]
Tags: R · Social Network Analysis