1 code implementation • 24 Oct 2024 • Muralikrishnna G. Sethuraman, Razieh Nabi, Faramarz Fekri
Causal discovery in real-world systems, such as biological networks, is often complicated by feedback loops and incomplete data.
1 code implementation • 6 Sep 2024 • Anna Guo, Razieh Nabi
The identification theory for causal effects in directed acyclic graphs (DAGs) with hidden variables is well-developed, but methods for estimating and inferring functionals beyond the g-formula remain limited.
no code implementations • 3 Aug 2024 • Razieh Nabi, David Benkeser
This paper introduces a framework for estimating fair optimal predictions using machine learning where the notion of fairness can be quantified using path-specific causal effects.
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.
3 code implementations • 15 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.
1 code implementation • 10 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.
1 code implementation • 1 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.
no code implementations • 11 Oct 2022 • Razieh Nabi, Rohit Bhattacharya, Ilya Shpitser, James M. 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.
no code implementations • 1 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.
no code implementations • 28 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.
no code implementations • 15 Oct 2020 • Razieh Nabi, Joel Pfeiffer, Murat Ali Bayir, Denis Charles, Emre Kiciman
This assumption is violated in settings where units are related through a network of dependencies.
no code implementations • 8 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.
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.
no code implementations • 27 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.
no code implementations • 9 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.
no code implementations • 29 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.
no code implementations • 27 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.
no code implementations • 6 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.
no code implementations • 29 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.