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CATEGORIES:Isaac Newton Institute Seminar Series
SUMMARY:Optimal Design of Experiments on Connected Units w
ith Application to Social Networks - Ben Parker (U
niversity of Southampton)
DTSTART;TZID=Europe/London:20160826T133000
DTEND;TZID=Europe/London:20160826T141000
UID:TALK67072AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/67072
DESCRIPTION:Co-authors: Steven G. Gilmour and Joh
n Schormans  \;
When experiments are performed on social net
works\, it is difficult to justify the usual assumption of treatment-unit additivity\, due t
o the connections between actors in the network.
We investigate how connections between experimenta
l units affect the design of experiments on those
experimental units. Specifically\, where we have
unstructured treatments\, whose effects propagate
according to a linear network effects model which
we introduce\, we show that optimal designs are
no longer necessarily balanced\; we further demon
strate how experiments which do not take a network
effect into account can lead to much higher vari
ance than necessary and/or a large bias. We show t
he use of this methodology in a very wide range o
f experiments in agricultural trials\, and crossov
er trials\, as well as experiments on conne
cted individuals in a social network.
LOCATION:Seminar Room 1\, Newton Institute
CONTACT:INI IT
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