[gov3009-l] Applied Stats Wkshop: Liz Stuart on matching, Wed@noon

adiamond@fas.harvard.edu adiamond@fas.harvard.edu
Mon, 17 Nov 2003 20:25:34 -0500


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Research Workshop in Applied Statistics
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Please join us this Wednesday @ noon at CBRSS,
the Center for Basic Research in the Social Sciences,
34 Kirkland Street, Rm 22, for a presentation by Elizabeth Stuart.  

Her talk is titled "Matching with Multiple Control Groups".

*ABSTRACT*
In observational studies, it is desirable to reduce bias due to covariates by 
obtaining treated and control groups with similar distributions of the 
covariates. This is often done by choosing well-matched samples of the 
original treated and control groups. However, sometimes the originally chosen 
control units cannot provide adequate matches for the treated units. In these 
cases, it may be desirable to obtain matched controls from two control groups. 
Multiple control groups have been used in the context of causal inference to 
test for hidden biases; however, little work has been done on their use in 
matching or adjustment for these biases. We provide a theoretical basis and 
practical guidelines for this new approach. The motivating example is a school-
wide dropout prevention program where students in the original treated and 
control schools were significantly different from one another. We consider the 
use of a second source of control students to supplement the original group. 

As always, lunch will be provided.

Contact information, the current schedule, and previous presentations may be
found at the course web site: http://www.courses.fas.harvard.edu/~gov3009/

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The Research Workshop in Applied Statistics is a forum for graduate
students, faculty, and visiting scholars to present and discuss work
in progress and exchange ideas.  It is intended as a tour of Harvard's
statistical innovations and applications with weekly stops in
different disciplines such as economics, epidemiology, medicine,
political science, psychology, public policy, public health, sociology
and statistics.  The topics of papers presented in previous years
included missing data, survey analysis, Bayesian simulation, sample
selection, and models for election and portfolio choice. Faculty and
student participants in the workshop present their current projects,
and guest speakers also give occasional presentations. The workshop
provides an excellent opportunity for informal interaction between
graduate students and faculty from a variety of disciplines. Course
credit is available for students as either an upper-level Government
or Sociology class. Lunch is provided.

If you are interested, note that all events are held at noon, in Room 22,
Center for Basic Research in Social Sciences (CBRSS, 34 Kirkland St., this is
the yellow building across the street from William James Hall).
Contact information and previous presentations may be found at the course web
site: http://www.courses.fas.harvard.edu/~gov3009/

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