Clément de Chaisemartin

Working textbook:

• Credible Answers to Hard Questions:  Differences-in-Differences for Natural Experiments (with Xavier D'Haultfoeuille), under contract with Princeton University Press.

Working papers:

• Clustering and External Validity in Randomized Controlled Trials (with Antoine Deeb)

• More Robust Estimators for Instrumental-Variable Panel Designs, With An Application to the Effect of Chinese Imports on US Employment (with Ziteng Lei). Slides. 

• Trading-off Bias and Variance in Stratified Randomized Controlled Trials, Under a Boundedness Condition on the Magnitude of the Treatment Effect

• Difference-in-Differences for Continuous Treatments and Instruments with Stayers (with Xavier D'Haultfoeuille, Félix Pasquier, Doulo Sow, and Gonzalo Vazquez-Bare). Slides.

• Two-way Fixed Effects and Difference-in-Difference Estimators in Heterogeneous Adoption Designs without Stayers (with Diego Cicca, Xavier D'Haultfoeuille, and Felix Knau)

• Estimating and predicting treatment-effect heterogeneity across sites, in multi-site randomized experiments with few randomization units per site.  (with Antoine Deeb)

• Event-Study Estimators and Variance Estimators Computed by the did_multiplegt_dyn Command (with Diego Cicca, Xavier D'Haultfoeuille, Felix Knau, Mélitine Malézieux, and Doulo Sow)

• Under the null of valid specification, pre-tests cannot make post-test inference liberal (with Xavier D'Haultfoeuille)

• Breaking the Barriers to Higher Education: The Long-Term Benefits of a Boarding School for Disadvantaged Students (with Luc Behaghel and Marc Gurgand)

Accepted and Published papers:

• Difference-in-Differences Estimators with Continuous Treatments and no Stayers (with Xavier D'Haultfoeuille and Gonzalo Vazquez-Bare). AEA P&P (not peer reviewed). Replication package.

• Difference-in-Differences Estimators of Intertemporal Treatment Effects (with Xavier D'Haultfoeuille). Forthcoming, ReStat. Slides.

• At What Level Should One Cluster Standard Errors in Paired and Small-Strata Experiments? (with Jaime Ramirez-Cuellar). AEJ Applied, 2024.

• Two-Way Fixed Effects and Differences-in-Differences with Heterogeneous Treatment Effects: A Survey (with Xavier D'Haultfoeuille). Econometrics Journal, 2023. Replication package.

• Two-way Fixed Effects and Differences-in-Differences Estimators with Several Treatments (with Xavier D'Haultfoeuille). Journal of Econometrics, 2023. Replication package.

• The direct and spillover effects of a nationwide socio-emotional learning program for disruptive students (with Nicolás Navarrete). Journal of Labor Economics, 2023. Resumen del estudio en español.

• BCG vaccination in infancy does not protect against COVID‐19: evidence from a natural experiment in Sweden (with Luc de Chaisemartin). Clinical Infectious Diseases, 2021. 

• Two-way fixed effects estimators with heterogeneous treatment effects (with Xavier D'Haultfoeuille). American Economic Review, 2020.
  Slides. .tex file, if you want to customize slides. Web Appendix. twowayfeweights and did_multiplegt Stata packages available from SSC repository. Blog coverage: The Replication Network 

• Estimating the effect of treatments allocated by randomized waiting lists (with Luc Behaghel). Econometrica, 2020. Web appendix. Stata adofile.

• Fuzzy Differences-in-Differences with Stata (with Xavier D'Haultfoeuille and Yannick Guyonvarch), The Stata Journal, 2019. Files to replicate the application to Gentzkow et al. (2011). fuzzydid Stata package available from the SSC repository.

• Fuzzy Differences-in-Differences (with Xavier D'Haultfoeuille), The Review of Economic Studies, 2018. Supplementary Material, Slides. 2019 Malinvaud prize, awarded by the French Economics Association to a paper published by a French economist below 40. 

• Tolerating Defiance? Local average treatment effects without monotonicity, Quantitative Economics, 2017. Supplementary material. 

• Ready for boarding? The effects of a boarding school for disadvantaged students (with Luc Behaghel and Marc Gurgand). AEJ Applied, 2017.

• Workplace smoking ban effects on unhappy smokers (with Pierre-Yves Geoffard and Anne-Laurence le Faou). Health Economics, 2011.

Work in progress:

• Baby Talk? The effects of a language acquisition intervention in nurseries on staff' practices and on children development (with Quentin Daviot, Marc Gurgand, Sophie Kern, and Florent de Bodman).

Resting papers (I am no longer working on those papers, but I hope you still enjoy reading them):

• Not all Differences-in-differences are Equally Compatible with Outcome-based Selection Models (with Xavier D'Haultfoeuille)

• Empirical MSE Minimization to Estimate a Scalar Parameter (with Xavier D'Haultfoeuille)

• A note on instrumented difference in differences

• Fuzzy Differences in Differences

Teaching:

• Lecture notes for the PhD-level econometrics courses I taught from 2016 to 2021 at UCSB.

Newspapers articles:

• Le Monde, 05/07/18: Mesurer l’impact des politiques publiques est un exercice indispensable.

• The Guardian, 05/02/15: Does boarding school really help disadvantaged students?

• The Conversation, 04/02/15: Send disadvantaged pupils to boarding school and only the brightest thrive.

• Le Monde, 14/05/13: L'éducation nationale doit se donner les moyens d'apprendre.

• L'Express, 24/05/13: Il faut réduire la taille des classes.

Policy reports:

• Lutter contre les inégalités dès la petite enfance : évaluation à grande échelle du programme Parler Bambin (with Quentin Daviot, Marc Gurgand, and Sophie Kern), Note IPP n°72

• Inégaux dès le berceau : des SMS pour améliorer les interactions langagières entre parents et enfants de familles défavorisées ? (with Charlotte Combier, Quentin Daviot, Marc Gurgand, and Sophie Kern), Note IPP n°59

• Graduating from high school: the effects of a boarding school for disadvantaged students on their secondary education (with Luc Behaghel and Marc Gurgand), J-PAL Europe/IPP – Retour d’expérience n°3 

• Investissons dans la petite enfance – L’égalité des chances se joue avant la maternelle (with Florent de Bodman, Romain Dugravier, and Marc Gurgand) report for French think tank Terra Nova, 2016 (media coverage: Les Echos, La Croix, France Info) 

• Les effets de l'internat d'excellence de Sourdun sur les élèves bénéficiaires: résultats d'une expérience contrôlée (with Luc Behaghel, Axelle Charpentier, and Marc Gurgand), report to the French fund for social experiments for youth, 2013. 

• Social experimentations: a guide to practice, report to the European Commission, 2011.