Search Results for author: Razieh Nabi

Found 16 papers, 3 papers with code

Targeted Machine Learning for Average Causal Effect Estimation Using the Front-Door Functional

1 code implementation15 Dec 2023 Anna Guo, David Benkeser, Razieh Nabi

As an alternative, the front-door criterion offers a solution, even in the presence of unmeasured confounders between treatment and outcome.

valid

Sufficient Identification Conditions and Semiparametric Estimation under Missing Not at Random Mechanisms

1 code implementation10 Jun 2023 Anna Guo, Jiwei Zhao, Razieh Nabi

This MNAR model corresponds to a so-called criss-cross structure considered in the literature on graphical models of missing data that prevents nonparametric identification of the entire missing data model.

valid

Learning Task-Aware Effective Brain Connectivity for fMRI Analysis with Graph Neural Networks

1 code implementation1 Nov 2022 Yue Yu, Xuan Kan, Hejie Cui, ran Xu, Yujia Zheng, Xiangchen Song, Yanqiao Zhu, Kun Zhang, Razieh Nabi, Ying Guo, Chao Zhang, Carl Yang

To better adapt GNNs for fMRI analysis, we propose TBDS, an end-to-end framework based on \underline{T}ask-aware \underline{B}rain connectivity \underline{D}AG (short for Directed Acyclic Graph) \underline{S}tructure generation for fMRI analysis.

Time Series Time Series Analysis

Causal and counterfactual views of missing data models

no code implementations11 Oct 2022 Razieh Nabi, Rohit Bhattacharya, Ilya Shpitser, James Robins

It is often said that the fundamental problem of causal inference is a missing data problem -- the comparison of responses to two hypothetical treatment assignments is made difficult because for every experimental unit only one potential response is observed.

Causal Identification Causal Inference +1

On Testability of the Front-Door Model via Verma Constraints

no code implementations1 Mar 2022 Rohit Bhattacharya, Razieh Nabi

The front-door criterion can be used to identify and compute causal effects despite the existence of unmeasured confounders between a treatment and outcome.

On Testability and Goodness of Fit Tests in Missing Data Models

no code implementations28 Feb 2022 Razieh Nabi, Rohit Bhattacharya

Significant progress has been made in developing identification and estimation techniques for missing data problems where modeling assumptions can be described via a directed acyclic graph.

A Semiparametric Approach to Interpretable Machine Learning

no code implementations8 Jun 2020 Numair Sani, Jaron Lee, Razieh Nabi, Ilya Shpitser

In order to combat this shortcoming, we propose a novel approach to trading off interpretability and performance in prediction models using ideas from semiparametric statistics, allowing us to combine the interpretability of parametric regression models with performance of nonparametric methods.

BIG-bench Machine Learning Decision Making +2

Full Law Identification In Graphical Models Of Missing Data: Completeness Results

no code implementations ICML 2020 Razieh Nabi, Rohit Bhattacharya, Ilya Shpitser

Missing data has the potential to affect analyses conducted in all fields of scientific study, including healthcare, economics, and the social sciences.

Semiparametric Inference For Causal Effects In Graphical Models With Hidden Variables

no code implementations27 Mar 2020 Rohit Bhattacharya, Razieh Nabi, Ilya Shpitser

We derive influence function based estimators that exhibit double robustness for the identified effects in a large class of hidden variable DAGs where the treatment satisfies a simple graphical criterion; this class includes models yielding the adjustment and front-door functionals as special cases.

Optimal Training of Fair Predictive Models

no code implementations9 Oct 2019 Razieh Nabi, Daniel Malinsky, Ilya Shpitser

Specifically, we show how to reparameterize the observed data likelihood such that fairness constraints correspond directly to parameters that appear in the likelihood, transforming a complex constrained optimization objective into a simple optimization problem with box constraints.

Fairness

Identification In Missing Data Models Represented By Directed Acyclic Graphs

no code implementations29 Jun 2019 Rohit Bhattacharya, Razieh Nabi, Ilya Shpitser, James M. Robins

Missing data is a pervasive problem in data analyses, resulting in datasets that contain censored realizations of a target distribution.

Causal Inference

Estimation of Personalized Effects Associated With Causal Pathways

no code implementations27 Sep 2018 Razieh Nabi, Phyllis Kanki, Ilya Shpitser

For example, we may wish to maximize the chemical effect of a drug given data from an observational study where the chemical effect of the drug on the outcome is entangled with the indirect effect mediated by differential adherence.

counterfactual Decision Making

Learning Optimal Fair Policies

no code implementations6 Sep 2018 Razieh Nabi, Daniel Malinsky, Ilya Shpitser

Systematic discriminatory biases present in our society influence the way data is collected and stored, the way variables are defined, and the way scientific findings are put into practice as policy.

Causal Inference Decision Making +1

Fair Inference On Outcomes

no code implementations29 May 2017 Razieh Nabi, Ilya Shpitser

We discuss a number of complications that arise in classical statistical inference due to this view and provide workarounds based on recent work in causal and semi-parametric inference.

Fairness

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