[YPNG] YPNG Friday 24 August, 11:00--1:00 -- NEW ROOM LOCATION

[Sekhar Tatikonda]

Hi Folks,

Room change:  the YPNG seminar this Friday will be held in 205 LOM (12
Hillhouse) at the same time 11-1.
The Stat's classroom is being used for the new student placement exam.

Regards,
sekhar









On Mon, Aug 20, 2018 at 2:45 PM, Sekhar Tatikonda <sekhar.tatikonda at yale.edu
> wrote:

>
> Hi Folks,
>
> This Friday Derek Feng will present:
>
> "Testing for Balance in Social Networks"
>
> Friendship and antipathy exist in concert with one another in real social
> networks.  Despite the role they play in social interactions, antagonistic
> ties are poorly understood and infrequently measured. One important theory
> of negative ties that has received relatively little empirical evaluation
> is balance theory, the codification of the adage `the enemy of my enemy is
> my friend' and similar sayings. Unbalanced triangles are those with an odd
> number of negative ties, and the theory posits that such triangles are
> rare. To test for balance, previous works have utilized a permutation test
> on the edge signs. The flaw in this method, however, is that it assumes
> that negative and positive edges are interchangeable. In reality, they
> could not be more different. Here, we propose a novel test of balance that
> accounts for this discrepancy and show that our test is more accurate at
> detecting balance. Along the way, we prove asymptotic normality of the test
> statistic under our null model, which is of independent interest. Our case
> study is a novel dataset of signed networks we collected from 32 isolated,
> rural villages in Honduras. Contrary to previous results, we find that
> there is only marginal evidence for balance in social tie formation in this
> setting.
>
> See you Friday at 11 in the Stat's classroom.
>
> Regards,
> Sekhar
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.yale.edu/pipermail/ypng/attachments/20180821/dddcc7ec/attachment-0001.html>