no code implementations • 15 Apr 2024 • Razieh Nabi, Nima S. Hejazi, Mark J. Van Der Laan, David Benkeser
Constrained learning has become increasingly important, especially in the realm of algorithmic fairness and machine learning.
1 code implementation • 1 Nov 2021 • Nima S. Hejazi, Wenjing Zheng, Sathya Anand
We present an end-to-end methodological framework for causal segment discovery that aims to uncover differential impacts of treatments across subgroups of users in large-scale digital experiments.
no code implementations • 12 Jun 2020 • Jeremy R. Coyle, Nima S. Hejazi, Ivana Malenica, Rachael V. Phillips, Benjamin F. Arnold, Andrew Mertens, Jade Benjamin-Chung, Weixin Cai, Sonali Dayal, John M. Colford Jr., Alan E. Hubbard, Mark J. Van Der Laan
Targeted Learning is a subfield of statistics that unifies advances in causal inference, machine learning and statistical theory to help answer scientifically impactful questions with statistical confidence.
2 code implementations • 22 May 2020 • Ashkan Ertefaie, Nima S. Hejazi, Mark J. Van Der Laan
We propose a class of nonparametric inverse probability weighted estimators in which the weighting mechanism is estimated via undersmoothing of the highly adaptive lasso, a nonparametric regression function proven to converge at $n^{-1/3}$-rate to the true weighting mechanism.
3 code implementations • 30 Mar 2020 • Nima S. Hejazi, Mark J. Van Der Laan, Holly E. Janes, Peter B. Gilbert, David C. Benkeser
We propose nonparametric methodology for efficiently estimating a counterfactual parameter that quantifies the impact of a given immune response marker on the subsequent probability of infection.
Methodology
1 code implementation • 16 Oct 2017 • Nima S. Hejazi, Sara Kherad-Pajouh, Mark J. Van Der Laan, Alan E. Hubbard
The widespread availability of high-dimensional biological data has made the simultaneous screening of many biological characteristics a central problem in computational biology and allied sciences.
Methodology
1 code implementation • 24 Apr 2017 • Weixin Cai, Nima S. Hejazi, Alan E. Hubbard
Current statistical inference problems in areas like astronomy, genomics, and marketing routinely involve the simultaneous testing of thousands -- even millions -- of null hypotheses.