1 code implementation • 25 Apr 2024 • Michael Lingzhi Li, Kosuke Imai
In this paper, we demonstrate that Neyman's methodology can also be used to experimentally evaluate the efficacy of individualized treatment rules (ITRs), which are derived by modern causal machine learning algorithms.
no code implementations • 11 Mar 2024 • Zeyang Jia, Kosuke Imai, Michael Lingzhi Li
Our extensive simulation studies show that, when compared to sample-splitting, cramming reduces the evaluation standard error by more than 40% while improving the performance of learned policy.
no code implementations • 12 Oct 2023 • Michael Lingzhi Li, Kosuke Imai
Across a wide array of disciplines, many researchers use machine learning (ML) algorithms to identify a subgroup of individuals who are likely to benefit from a treatment the most (``exceptional responders'') or those who are harmed by it.
1 code implementation • 5 Jun 2023 • Junling Liu, Peilin Zhou, Yining Hua, Dading Chong, Zhongyu Tian, Andrew Liu, Helin Wang, Chenyu You, Zhenhua Guo, Lei Zhu, Michael Lingzhi Li
To the best of our knowledge, CMExam is the first Chinese medical exam dataset to provide comprehensive medical annotations.
no code implementations • 15 Oct 2022 • Dimitris Bertsimas, Kosuke Imai, Michael Lingzhi Li
We consider the estimation of average treatment effects in observational studies and propose a new framework of robust causal inference with unobserved confounders.
no code implementations • 28 Mar 2022 • Kosuke Imai, Michael Lingzhi Li
In addition, we develop nonparametric tests of treatment effect homogeneity across groups, and rank-consistency of within-group average treatment effects.
1 code implementation • 29 Oct 2021 • Dimitris Bertsimas, Kimberly Villalobos Carballo, Léonard Boussioux, Michael Lingzhi Li, Alex Paskov, Ivan Paskov
This paper presents a novel holistic deep learning framework that simultaneously addresses the challenges of vulnerability to input perturbations, overparametrization, and performance instability from different train-validation splits.
no code implementations • 3 Mar 2021 • Dimitris Bertsimas, Michael Lingzhi Li
We introduce a stochastic version of the cutting-plane method for a large class of data-driven Mixed-Integer Nonlinear Optimization (MINLO) problems.
no code implementations • 15 Feb 2021 • Dimitris Bertsimas, Vassilis Digalakis Jr., Alexander Jacquillat, Michael Lingzhi Li, Alessandro Previero
As compared to benchmarks based on demographic and epidemiological information, the proposed optimization approach increases the effectiveness of the vaccination campaign by an estimated $20\%$, saving an extra $4000$ extra lives in the United States over a three-month period.
no code implementations • 30 Jun 2020 • Dimitris Bertsimas, Léonard Boussioux, Ryan Cory Wright, Arthur Delarue, Vassilis Digalakis Jr., Alexandre Jacquillat, Driss Lahlou Kitane, Galit Lukin, Michael Lingzhi Li, Luca Mingardi, Omid Nohadani, Agni Orfanoudaki, Theodore Papalexopoulos, Ivan Paskov, Jean Pauphilet, Omar Skali Lami, Bartolomeo Stellato, Hamza Tazi Bouardi, Kimberly Villalobos Carballo, Holly Wiberg, Cynthia Zeng
Specifically, we propose a comprehensive data-driven approach to understand the clinical characteristics of COVID-19, predict its mortality, forecast its evolution, and ultimately alleviate its impact.
no code implementations • 13 Nov 2019 • Michael Lingzhi Li, Meng Dong, Jiawei Zhou, Alexander M. Rush
We derive theoretical results about the discriminative power and feature representation capabilities of each class.
no code implementations • 21 Oct 2019 • Dimitris Bertsimas, Michael Lingzhi Li
We formulate the problem of matrix completion with and without side information as a non-convex optimization problem.
no code implementations • 14 May 2019 • Kosuke Imai, Michael Lingzhi Li
We extend our methodology to a common setting, in which the same experimental data is used to both estimate and evaluate ITRs.
no code implementations • ICLR 2020 • Michael Lingzhi Li, Elliott Wolf, Daniel Wintz
Optimizing storage assignment is a central problem in warehousing.
no code implementations • 8 Feb 2019 • Dimitris Bertsimas, Michael Lingzhi Li
We propose a new scalable algorithm for holistic linear regression building on Bertsimas & King (2016).
no code implementations • 17 Dec 2018 • Dimitris Bertsimas, Michael Lingzhi Li
We consider the problem of matrix completion on an $n \times m$ matrix.