... Inference1
We thank Olivia Lau for helpful suggestions about incorporating MATCHIT into Zelig.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
... Ho,2
Assistant Professor of Law & Robert E. Paradise Faculty Scholar, Stanford Law School (559 Nathan Abbott Way, Stanford CA 94305; http://dho.stanford.edu, dho@law.stanford.edu, (650) 723-9560).
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
... Imai,3
Assistant Professor, Department of Politics, Princeton University (Corwin Hall 041, Department of Politics, Princeton University, Princeton NJ 08544, USA; http://imai.princeton.edu, kimai@Princeton.Edu).
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
... King,4
David Florence Professor of Government, Harvard University (Institute for Quantitative Social Science, 1737 Cambridge Street, Harvard University, Cambridge MA 02138; http://GKing.Harvard.Edu, King@Harvard.Edu, (617) 495-2027).
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
... Stuart5
Assistant Professor, Departments of Mental Health and Biostatistics, Johns Hopkins Bloomberg School of Public Health (624 N Broadway, Room 804, Baltimore, MD 21205; http://www.biostat.jhsph.edu/$ \sim$ estuart, estuart@jhsph.edu).
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
... (PSID).3.1
This data set, lalonde, was created using NSWRE74_TREATED.TXT and CPS3_CONTROLS.TXT from http://www.columbia.edu/$ \sim$ rd247/nswdata.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
... score4.1
The linear propensity scores are obtained by transforming back onto a linear scale.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
... elements:4.2
When inapplicable or unnecessary, these elements may equal NULL. For example, when exact matching, match.matrix = NULL.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.