Calendrier du 13 décembre 2021
Roy Seminar (ADRES)
Du 13/12/2021 de 17:00 à 18:15
R1-09 Campus Jourdan 75014 Paris
Econometrics Seminar
Du 13/12/2021 de 16:00 à 17:15
KOLESAR Michal (Princeton)
On Estimating Multiple Treatment Effects with Regression
écrit avec Co-authors: Paul Goldsmith-Pinkham and Peter Hull
We study the causal interpretation of regressions on multiple dependent treatments and flexible controls. Such regressions are often used to analyze randomized control trials with multiple intervention arms, and to estimate institutional quality (e.g. teacher value-added) with observational data. We show that, unlike with a single binary treatment, these regressions do not generally estimate convex averages of causal effects-even when the treatments are conditionally randomly assigned and the controls fully address omitted variables bias. We discuss different solutions to this issue, and propose as a solution anew class of efficient estimators of weighted average treatment effects.
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Régulation et Environnement
Du 13/12/2021 de 12:00 à 13:15
Salle R2-21 - Campus Jourdan 75014 Paris
CAMBONI Riccardo (University of Padova)
Bidding on price and quality: An experiment on the complexity of scoring rule auctions
We experimentally study procurement auctions when both quality and price matter. We compare two treatments where sellers compete on one dimension only (price or quality), with three two-dimensional treatments where sellers submit a price-quality bid, and the winner is determined by a score that combines the two offers. We find that, in the two-dimensional treatments, efficiency and buyer's utility are lower than their predicted levels. Estimates from a Quantal Response Equilibrium model suggest that increasing the dimensionality and the size of the suppliers' strategy space increases their tendency to bid suboptimally, thus undermining the theoretical superiority of more complex mechanisms.