Search Results for author: Bijan Mazaheri

Found 9 papers, 1 papers with code

Omitted Labels in Causality: A Study of Paradoxes

no code implementations12 Nov 2023 Bijan Mazaheri, Siddharth Jain, Matthew Cook, Jehoshua Bruck

We explore what we call ``omitted label contexts,'' in which training data is limited to a subset of the possible labels.

Causal Inference

Identification of Mixtures of Discrete Product Distributions in Near-Optimal Sample and Time Complexity

no code implementations25 Sep 2023 Spencer L. Gordon, Erik Jahn, Bijan Mazaheri, Yuval Rabani, Leonard J. Schulman

We consider the problem of identifying, from statistics, a distribution of discrete random variables $X_1,\ldots, X_n$ that is a mixture of $k$ product distributions.

2k Tensor Decomposition

Causal Information Splitting: Engineering Proxy Features for Robustness to Distribution Shifts

no code implementations10 May 2023 Bijan Mazaheri, Atalanti Mastakouri, Dominik Janzing, Michaela Hardt

Statistical prediction models are often trained on data from different probability distributions than their eventual use cases.

counterfactual feature selection

Causal Inference Despite Limited Global Confounding via Mixture Models

no code implementations22 Dec 2021 Spencer L. Gordon, Bijan Mazaheri, Yuval Rabani, Leonard J. Schulman

A Bayesian Network is a directed acyclic graph (DAG) on a set of $n$ random variables (the vertices); a Bayesian Network Distribution (BND) is a probability distribution on the random variables that is Markovian on the graph.

Causal Inference

Expert Graphs: Synthesizing New Expertise via Collaboration

no code implementations15 Jul 2021 Bijan Mazaheri, Siddharth Jain, Jehoshua Bruck

Consider multiple experts with overlapping expertise working on a classification problem under uncertain input.

Source Identification for Mixtures of Product Distributions

no code implementations29 Dec 2020 Spencer L. Gordon, Bijan Mazaheri, Yuval Rabani, Leonard J. Schulman

We give an algorithm for source identification of a mixture of $k$ product distributions on $n$ bits.

Robust Correction of Sampling Bias Using Cumulative Distribution Functions

1 code implementation NeurIPS 2020 Bijan Mazaheri, Siddharth Jain, Jehoshua Bruck

Varying domains and biased datasets can lead to differences between the training and the target distributions, known as covariate shift.

The Sparse Hausdorff Moment Problem, with Application to Topic Models

no code implementations16 Jul 2020 Spencer Gordon, Bijan Mazaheri, Leonard J. Schulman, Yuval Rabani

We give an algorithm for identifying a $k$-mixture using samples of $m=2k$ iid binary random variables using a sample of size $\left(1/w_{\min}\right)^2 \cdot\left(1/\zeta\right)^{O(k)}$ and post-sampling runtime of only $O(k^{2+o(1)})$ arithmetic operations.

2k Topic Models

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