Search Results for author: Wenbin Lu

Found 23 papers, 7 papers with code

On Validation and Planning of An Optimal Decision Rule with Application in Healthcare Studies

no code implementations ICML 2020 Hengrui Cai, Wenbin Lu, Rui Song

Estimation of optimal decision rules (ODR) has been extensively investigated recently, however, at present, no testing procedure is proposed to verify whether these ODRs are significantly better than the naive decision rule that always assigning individuals to a fixed treatment option.

Mining the Factor Zoo: Estimation of Latent Factor Models with Sufficient Proxies

no code implementations25 Dec 2022 Runzhe Wan, YingYing Li, Wenbin Lu, Rui Song

Latent factor model estimation typically relies on either using domain knowledge to manually pick several observed covariates as factor proxies, or purely conducting multivariate analysis such as principal component analysis.

regression

Adaptive Semi-Supervised Inference for Optimal Treatment Decisions with Electronic Medical Record Data

no code implementations4 Mar 2022 Kevin Gunn, Wenbin Lu, Rui Song

Simulation studies are conducted to assess the empirical performance of the proposed method and to compare with a fully supervised method using only the labeled data.

Imputation

On Learning and Testing of Counterfactual Fairness through Data Preprocessing

no code implementations25 Feb 2022 Haoyu Chen, Wenbin Lu, Rui Song, Pulak Ghosh

Machine learning has become more important in real-life decision-making but people are concerned about the ethical problems it may bring when used improperly.

BIG-bench Machine Learning counterfactual +2

Targeted Optimal Treatment Regime Learning Using Summary Statistics

no code implementations17 Jan 2022 Jianing Chu, Wenbin Lu, Shu Yang

We consider the problem of treatment regime estimation when the source and target populations may be heterogeneous, individual-level data is available from the source population, and only the summary information of covariates, such as moments, is accessible from the target population.

Decision Making

Jump Interval-Learning for Individualized Decision Making

no code implementations17 Nov 2021 Hengrui Cai, Chengchun Shi, Rui Song, Wenbin Lu

To derive an optimal I2DR, our jump interval-learning method estimates the conditional mean of the outcome given the treatment and the covariates via jump penalized regression, and derives the corresponding optimal I2DR based on the estimated outcome regression function.

Decision Making regression

A Probit Tensor Factorization Model For Relational Learning

no code implementations6 Nov 2021 Ye Liu, Rui Song, Wenbin Lu, Yanghua Xiao

A large number of models and algorithms have been proposed to perform link prediction, among which tensor factorization method has proven to achieve state-of-the-art performance in terms of computation efficiency and prediction accuracy.

Knowledge Graphs Link Prediction +1

CAPITAL: Optimal Subgroup Identification via Constrained Policy Tree Search

1 code implementation11 Oct 2021 Hengrui Cai, Wenbin Lu, Rachel Marceau West, Devan V. Mehrotra, Lingkang Huang

In this paper, we present an optimal subgroup selection rule (SSR) that maximizes the number of selected patients, and in the meantime, achieves the pre-specified clinically meaningful mean outcome, such as the average treatment effect.

Calibrated Optimal Decision Making with Multiple Data Sources and Limited Outcome

1 code implementation21 Apr 2021 Hengrui Cai, Wenbin Lu, Rui Song

We consider the optimal decision-making problem in a primary sample of interest with multiple auxiliary sources available.

Decision Making

GEAR: On Optimal Decision Making with Auxiliary Data

no code implementations21 Apr 2021 Hengrui Cai, Rui Song, Wenbin Lu

We propose an auGmented inverse propensity weighted Experimental and Auxiliary sample-based decision Rule (GEAR) by maximizing the augmented inverse propensity weighted value estimator over a class of decision rules using the experimental sample, with the primary outcome being imputed based on the auxiliary sample.

Decision Making

ANOCE: Analysis of Causal Effects with Multiple Mediators via Constrained Structural Learning

no code implementations ICLR 2021 Hengrui Cai, Rui Song, Wenbin Lu

Under a general causal graph, the exposure may have a direct effect on the outcome and also an indirect effect regulated by a set of mediators.

Counterfactual Fairness through Data Preprocessing

no code implementations1 Jan 2021 Haoyu Chen, Wenbin Lu, Rui Song, Pulak Ghosh

Machine learning has become more important in real-life decision-making but people are concerned about the ethical problems it may bring when used improperly.

BIG-bench Machine Learning counterfactual +2

GraphCGAN: Convolutional Graph Neural Network with Generative Adversarial Networks

no code implementations1 Jan 2021 Sheng Zhang, Rui Song, Wenbin Lu

In a number of experiments on benchmark datasets, we show that the proposed GraphCGAN outperforms the baseline methods by a significant margin.

Statistical Inference for Online Decision-Making: In a Contextual Bandit Setting

no code implementations14 Oct 2020 Haoyu Chen, Wenbin Lu, Rui Song

Based on the properties of the parameter estimators, we further show that the in-sample inverse propensity weighted value estimator is asymptotically normal.

Decision Making

Statistical Inference for Online Decision Making via Stochastic Gradient Descent

1 code implementation14 Oct 2020 Haoyu Chen, Wenbin Lu, Rui Song

Focusing on the statistical inference of online decision making, we establish the asymptotic normality of the parameter estimator produced by our algorithm and the online inverse probability weighted value estimator we used to estimate the optimal value.

Decision Making

Kernel Assisted Learning for Personalized Dose Finding

1 code implementation19 Jul 2020 Liangyu Zhu, Wenbin Lu, Michael R. Kosorok, Rui Song

In this article, we propose a kernel assisted learning method for estimating the optimal individualized dose rule.

Decision Making

Implications from ASKAP Fast Radio Burst Statistics

no code implementations28 Feb 2019 Wenbin Lu, Anthony L. Piro

Although there has recently been tremendous progress in studies of fast radio bursts (FRBs), the nature of their progenitors remains a mystery.

High Energy Astrophysical Phenomena

Post-Lasso Inference for High-Dimensional Regression

2 code implementations16 Jun 2018 X. Jessie Jeng, Huimin Peng, Wenbin Lu

In this paper, we consider variable selection from a new perspective motivated by the frequently occurred phenomenon that relevant variables are not completely distinguishable from noise variables on the solution path.

Methodology

Robust Learning for Optimal Treatment Decision with NP-Dimensionality

no code implementations15 Oct 2015 Chengchun Shi, Rui Song, Wenbin Lu

In this paper, we propose a two-step estimation procedure for deriving the optimal treatment regime under NP dimensionality.

Sequential Advantage Selection for Optimal Treatment Regimes

no code implementations20 May 2014 Ailin Fan, Wenbin Lu, Rui Song

Gunter et al. (2011) proposed S-score which characterizes the magnitude of qualitative interaction of each variable with treatment individually.

Decision Making Variable Selection

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