Search Results for author: Agni Orfanoudaki

Found 7 papers, 0 papers with code

Distribution-free risk assessment of regression-based machine learning algorithms

no code implementations5 Oct 2023 Sukrita Singh, Neeraj Sarna, Yuanyuan Li, Yang Li, Agni Orfanoudaki, Michael Berger

We solve the risk-assessment problem using the conformal prediction approach, which provides prediction intervals that are guaranteed to contain the true label with a given probability.

Conformal Prediction Prediction Intervals +1

Algorithmic Insurance

no code implementations1 Jun 2021 Dimitris Bertsimas, Agni Orfanoudaki

Specifically, we present an optimization formulation to estimate the risk exposure of a binary classification model given a pre-defined range of premiums.

Binary Classification Breast Cancer Detection +1

Optimal Survival Trees

no code implementations8 Dec 2020 Dimitris Bertsimas, Jack Dunn, Emma Gibson, Agni Orfanoudaki

Tree-based models are increasingly popular due to their ability to identify complex relationships that are beyond the scope of parametric models.

Personalized Treatment for Coronary Artery Disease Patients: A Machine Learning Approach

no code implementations18 Oct 2019 Dimitris Bertsimas, Agni Orfanoudaki, Rory B. Weiner

We are able to estimate with average R squared = 0. 801 the time from diagnosis to a potential adverse event (TAE) and gain accurate approximations of the counterfactual treatment effects.

BIG-bench Machine Learning counterfactual +1

Interpretable Clustering via Optimal Trees

no code implementations3 Dec 2018 Dimitris Bertsimas, Agni Orfanoudaki, Holly Wiberg

State-of-the-art clustering algorithms use heuristics to partition the feature space and provide little insight into the rationale for cluster membership, limiting their interpretability.

Clustering

Imputation of Clinical Covariates in Time Series

no code implementations2 Dec 2018 Dimitris Bertsimas, Agni Orfanoudaki, Colin Pawlowski

Missing data is a common problem in real-world settings and particularly relevant in healthcare applications where researchers use Electronic Health Records (EHR) and results of observational studies to apply analytics methods.

Imputation Time Series +1

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