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Card, David, David Lee, Zhuan Pei, and Andrea Weber. (2015) 2015. “Inference on Causal Effects in a Generalized Regression Kink Design”. Econometrica 83 (6): 2453. Referenced from search.proquest.com: Inference on Causal Effects in a Generalized Regression Kink Design.

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Lee, David, and David Card. (2008) 2008. “Regression Discontinuity Inference With Specification Error”. Journal of Econometrics 142 (2). Amsterdam: Elsevier Sequoia S.A.: 655. Referenced from search.proquest.com: Regression discontinuity inference with specification error.