Fe, Eduardo (2012): Efficient estimation in regression discontinuity designs via asymmetric kernels.

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Abstract
Estimation of causal eects in regression discontinuity designs relies on a local Wald estimator whose components are estimated via local linear regressions centred at an specic point in the range of a treatment assignment variable. The asymptotic distribution of the estimator depends on the specic choice of kernel used in these nonparametric regressions, with some popular kernels causing a notable loss of effciency. This article presents the asymptotic distribution of the local Wald estimator when a gamma kernel is used in each local linear regression. The resulting statistics is easy to implement, consistent at the usual nonparametric rate, maintains its asymptotic normal distribution, but its bias and variance do not depend on kernelrelated constants and, as a result, is becomes a more effcient method. The effciency gains are measured via a limited Monte Carlo experiment, and the new method is used in a substantive application.
Item Type:  MPRA Paper 

Original Title:  Efficient estimation in regression discontinuity designs via asymmetric kernels 
Language:  English 
Keywords:  Regression Discontinuity; Asymmetric Kernels; Local Linear Regression 
Subjects:  C  Mathematical and Quantitative Methods > C1  Econometric and Statistical Methods and Methodology: General > C13  Estimation: General C  Mathematical and Quantitative Methods > C1  Econometric and Statistical Methods and Methodology: General > C14  Semiparametric and Nonparametric Methods: General C  Mathematical and Quantitative Methods > C2  Single Equation Models; Single Variables > C21  CrossSectional Models; Spatial Models; Treatment Effect Models; Quantile Regressions 
Item ID:  38164 
Depositing User:  Eduardo Fe 
Date Deposited:  17. Apr 2012 18:18 
Last Modified:  18. Feb 2013 05:53 
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URI:  http://mpra.ub.unimuenchen.de/id/eprint/38164 