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Testing Stability of Regression Discontinuity Models

aIRCrES-CNR, National Research Council of Italy, Rome, Italy
bDepartment of Economics, UC Irvine, CA, USA
cDepartment of Economics, Boston College, Chestnut Hill, MA, USA

Regression Discontinuity Designs

ISBN: 978-1-78714-390-6, eISBN: 978-1-78714-389-0

Publication date: 13 May 2017


Regression discontinuity (RD) models are commonly used to nonparametrically identify and estimate a local average treatment effect. Dong and Lewbel (2015) show how a derivative of this effect, called treatment effect derivative (TED) can be estimated. We argue here that TED should be employed in most RD applications, as a way to assess the stability and hence external validity of RD estimates. Closely related to TED, we define the complier probability derivative (CPD). Just as TED measures stability of the treatment effect, the CPD measures stability of the complier population in fuzzy designs. TED and CPD are numerically trivial to estimate. We provide relevant Stata code, and apply it to some real datasets.




We would like to thank Damon Clark for sharing the Florida data.


Cerulli, G., Dong, Y., Lewbel, A. and Poulsen, A. (2017), "Testing Stability of Regression Discontinuity Models", Regression Discontinuity Designs (Advances in Econometrics, Vol. 38), Emerald Publishing Limited, Leeds, pp. 317-339.



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