Why High-order Polynomials Should not be Used in Regression Discontinuity Designs

It is common in regression discontinuity analysis to control for high order (third, fourth, or higher) polynomials of the forcing variable. We argue that estimators for causal effects based on such methods can be misleading, and we recommend researchers do not use them, and instead use estimators based on local linear or quadratic polynomials or other smooth functions.

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Year of publication:	2014-08
Authors:	Imbens, Guido ; Gelman, Andrew
Institutions:	National Bureau of Economic Research (NBER)

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Extent:	application/pdf
Series:	NBER Working Papers.
Type of publication:	Book / Working Paper
Notes:	LS The price is Paper copy available by mail Number 20405
Classification:	C01 - Econometrics ; C1 - Econometric and Statistical Methods: General
Source:	RePEc - Research Papers in Economics

Persistent link: https://www.econbiz.de/10010890098