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dc.contributor.authorBlackwell, Matthew
dc.contributor.authorIacus, Stefano
dc.contributor.authorKing, Gary
dc.contributor.authorPorro, Giuseppe
dc.date.accessioned2010-07-19T19:44:57Z
dc.date.issued2010
dc.identifier.citationBlackwell, Matthew, Stefano Iacus, Gary King, and Giuseppe Porro. 2010. cem: Coarsened exact matching in stata. Stata Journal 9(4): 524-546.en_US
dc.identifier.issn1536-867Xen_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:4314511
dc.description.abstractThis paper introduces a Stata implementation of Coarsened Exact Matching (CEM), a new method for improving the estimation of causal effects by reducing imbalance in co-variates between treated and control groups. CEM is faster, easier to use and understand, requires fewer assumptions, more easily automated, and possesses more attractive statistical properties for many applications than existing matching methods. In CEM, users temporarily coarsen their data, exact match on these coarsened data, then run their analysis on the uncoarsened, matched data. CEM bounds the degree of model dependence and causal effect estimation error by ex ante user choice, is montonic imbalance bounding (so that reducing the maximum imbalance on one variable has no e ect on others), does not require a separate procedure to restrict data to common support, meets the congruence principle, is approximately invariant to measurement error, balances all nonlinearities and interactions in-sample (i.e., not merely in expectation), and works with multiply imputed data sets. Other matching methods inheret [sic] many of CEM's properties when applied to further match data preprocessed by CEM. The library cem implements the CEM algorithm in Stata.en_US
dc.description.sponsorshipGovernmenten_US
dc.language.isoen_USen_US
dc.publisherStataCorpen_US
dc.relation.isversionofhttp://www.stata-journal.com/en_US
dc.relation.hasversionhttp://gking.harvard.edu/files/cem-stata.pdfen_US
dash.licenseLAA
dc.titlecem: Coarsened Exact Matching in Stataen_US
dc.typeJournal Articleen_US
dc.description.versionAccepted Manuscripten_US
dc.relation.journalStata Journalen_US
dash.depositing.authorKing, Gary
dc.date.available2010-07-19T19:44:57Z
dash.identifier.orcid0000-0002-5327-7631*
dash.contributor.affiliatedKing, Gary
dc.identifier.orcid0000-0002-5327-7631


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