Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/34493
Authors: 
Frölich, Markus
Year of Publication: 
2007
Series/Report no.: 
IZA Discussion Papers 3024
Abstract: 
In this paper, the regression discontinuity design (RDD) is generalized to account for differences in observed covariates X in a fully nonparametric way. It is shown that the treatment effect can be estimated at the rate for one-dimensional nonparametric regression irrespective of the dimension of X. It thus extends the analysis of Hahn, Todd, and van der Klaauw (2001) and Porter (2003), who examined identification and estimation without covariates, requiring assumptions that may often be too strong in applications. In many applications, individuals to the left and right of the threshold differ in observed characteristics. Houses may be constructed in different ways across school attendance district boundaries. Firms may differ around a threshold that implies certain legal changes, etc. Accounting for these differences in covariates is important to reduce bias. In addition, accounting for covariates may also reduces variance. Finally, estimation of quantile treatment effects (QTE) is also considered.
Subjects: 
Treatment effect
causal effect
complier
LATE
nonparametric regression
endogeneity
Document Type: 
Working Paper

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