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Optimal Model Selection in RDD and Related Settings Using Placebo Zones

Nathan Kettlewell, Peter Siminski

arXiv 8 Dec 2022 · Econometrics · 3 citations (OpenAlex)

arXiv:2212.04043 · PDF · DOI · OpenAlex · Extracted main text

Abstract

We propose a new model-selection algorithm for Regression Discontinuity Design, Regression Kink Design, and related IV estimators. Candidate models are assessed within a 'placebo zone' of the running variable, where the true effects are known to be zero. The approach yields an optimal combination of bandwidth, polynomial, and any other choice parameters. It can also inform choices between classes of models (e.g. RDD versus cohort-IV) and any other choices, such as covariates, kernel, or other weights. We outline sufficient conditions under which the approach is asymptotically optimal. The approach also performs favorably under more general conditions in a series of Monte Carlo simulations. We demonstrate the approach in an evaluation of changes to Minimum Supervised Driving Hours in the Australian state of New South Wales. We also re-evaluate evidence on the effects of Head Start and Minimum Legal Drinking Age. Our Stata commands implement the procedure and compare its performance to other approaches.

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33
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Most heavily cited references

The works this paper leans on most, across its whole bibliography — not restricted to papers in our corpus. Ranked by composite intensity, which combines how often a work is mentioned, how many sections mention it, and how much of that falls in the main text rather than the appendix.

ReferenceIntensityMentionsSectionsMain text
1ludwig_miller_2007 APACrefauthors Ludwig, J. \ Miller, D L. APACrefa… (2007) 20071.00063100%
2kettlewell_siminski_2020 APACrefauthors Kettlewell, N. \ Siminski, P… (2020) 20201.00054100%
3ganong_jager_2018 APACrefauthors Ganong, P. \ Jäger, S. APACrefautho… (2018) 20180.92843100%
4lindo_siminski_yerokhin_2016 APACrefauthors Lindo, J. , Siminski, P.… (2016) 20160.92843100%
5carpenter_dobkin_2009 APACrefauthors Carpenter, C. \ Dobkin, C. APAC… (2009) 20090.81142100%
6calonico_et_al_2019 APACrefauthors Calonico, S. , Cattaneo, M D. , F… (2019) 20190.69361100%
7calonico_cattaneo_titiunik_2014 APACrefauthors Calonico, S. , Cattan… (2014) 20140.64422100%
8card_etal_2017 APACrefauthors Card, D. , Lee, D S. , Pei, Z. \ Weber… (2017) 20170.58531100%
9gelman_imbens_2019 APACrefauthors Gelman, A. \ Imbens, G. APACrefaut… (2019) 20190.58531100%
10angrist_lavy_1999 APACrefauthors Angrist, J D. \ Lavy, V. APACrefaut… (1999) 19990.51121100%

Showing the top 10 of 33 scored citations.