*****  To join INSNA, visit  *****

We have also relied on methods like the ones Tom Valente mentioned in  
many of our observational studies, and we summarize the pluses and  
minuses of this approach in a new paper here:

I also in principle like the actor-oriented model approach of Siena,  
but in the past I could never get the model to converge for networks  
larger than 1000 nodes (this might be my own failing, though, as there  
is always a bit of art to getting models like that to work).

We also have relied on experiments like this one in PNAS:

and I am a big fan of David Nickerson's voter experiment and Sinan's  
new RCT.

But I would resist abandoning evidence from observational studies.

The resistance to observational studies reminds me of this Onion story:

Multiple Stab Wounds May Be Harmful To Monkeys



James H. Fowler
Professor of Medical Genetics and Political Science
UC San Diego


SOCNET is a service of INSNA, the professional association for social
network researchers ( To unsubscribe, send
an email message to [log in to unmask] containing the line
UNSUBSCRIBE SOCNET in the body of the message.