Search Results for author: Greg Lewis

Found 12 papers, 6 papers with code

Double/Debiased Machine Learning for Dynamic Treatment Effects

no code implementations NeurIPS 2021 Greg Lewis, Vasilis Syrgkanis

We consider the estimation of treatment effects in settings when multiple treatments are assigned over time and treatments can have a causal effect on future outcomes.

BIG-bench Machine Learning

Maximum Likelihood Estimation of Differentiated Products Demand Systems

no code implementations24 Nov 2021 Greg Lewis, Bora Ozaltun, Georgios Zervas

We discuss estimation of the differentiated products demand system of Berry et al (1995) (BLP) by maximum likelihood estimation (MLE).

Estimating the Long-Term Effects of Novel Treatments

no code implementations NeurIPS 2021 Keith Battocchi, Eleanor Dillon, Maggie Hei, Greg Lewis, Miruna Oprescu, Vasilis Syrgkanis

Policy makers typically face the problem of wanting to estimate the long-term effects of novel treatments, while only having historical data of older treatment options.

BIG-bench Machine Learning

Mostly Harmless Machine Learning: Learning Optimal Instruments in Linear IV Models

no code implementations12 Nov 2020 Jiafeng Chen, Daniel L. Chen, Greg Lewis

We offer straightforward theoretical results that justify incorporating machine learning in the standard linear instrumental variable setting.

BIG-bench Machine Learning

Minimax Estimation of Conditional Moment Models

1 code implementation NeurIPS 2020 Nishanth Dikkala, Greg Lewis, Lester Mackey, Vasilis Syrgkanis

We develop an approach for estimating models described via conditional moment restrictions, with a prototypical application being non-parametric instrumental variable regression.

Double/Debiased Machine Learning for Dynamic Treatment Effects via g-Estimation

no code implementations17 Feb 2020 Greg Lewis, Vasilis Syrgkanis

We consider the estimation of treatment effects in settings when multiple treatments are assigned over time and treatments can have a causal effect on future outcomes or the state of the treated unit.

BIG-bench Machine Learning Model Selection +1

Machine Learning Estimation of Heterogeneous Treatment Effects with Instruments

2 code implementations NeurIPS 2019 Vasilis Syrgkanis, Victor Lei, Miruna Oprescu, Maggie Hei, Keith Battocchi, Greg Lewis

We develop a statistical learning approach to the estimation of heterogeneous effects, reducing the problem to the minimization of an appropriate loss function that depends on a set of auxiliary models (each corresponding to a separate prediction task).

BIG-bench Machine Learning

Semi-Parametric Efficient Policy Learning with Continuous Actions

1 code implementation NeurIPS 2019 Mert Demirer, Vasilis Syrgkanis, Greg Lewis, Victor Chernozhukov

Our results also apply if the model does not satisfy our semi-parametric form, but rather we measure regret in terms of the best projection of the true value function to this functional space.

Off-policy evaluation

Non-Parametric Inference Adaptive to Intrinsic Dimension

1 code implementation11 Jan 2019 Khashayar Khosravi, Greg Lewis, Vasilis Syrgkanis

We show that if the intrinsic dimension of the covariate distribution is equal to $d$, then the finite sample estimation error of our estimator is of order $n^{-1/(d+2)}$ and our estimate is $n^{1/(d+2)}$-asymptotically normal, irrespective of $D$.

Adversarial Generalized Method of Moments

1 code implementation19 Mar 2018 Greg Lewis, Vasilis Syrgkanis

We provide an approach for learning deep neural net representations of models described via conditional moment restrictions.

Causal Inference Clustering

Deep IV: A Flexible Approach for Counterfactual Prediction

1 code implementation ICML 2017 Jason Hartford, Greg Lewis, Kevin Leyton-Brown, Matt Taddy

Counterfactual prediction requires understanding causal relationships between so-called treatment and outcome variables.

counterfactual

Counterfactual Prediction with Deep Instrumental Variables Networks

no code implementations30 Dec 2016 Jason Hartford, Greg Lewis, Kevin Leyton-Brown, Matt Taddy

We are in the middle of a remarkable rise in the use and capability of artificial intelligence.

counterfactual

Cannot find the paper you are looking for? You can Submit a new open access paper.