Search Results for author: Stratis Tsirtsis

Found 8 papers, 7 papers with code

Finding Counterfactually Optimal Action Sequences in Continuous State Spaces

1 code implementation NeurIPS 2023 Stratis Tsirtsis, Manuel Gomez-Rodriguez

Whenever a clinician reflects on the efficacy of a sequence of treatment decisions for a patient, they may try to identify critical time steps where, had they made different decisions, the patient's health would have improved.

Causal Inference Decision Making

On the Within-Group Fairness of Screening Classifiers

1 code implementation31 Jan 2023 Nastaran Okati, Stratis Tsirtsis, Manuel Gomez Rodriguez

Screening classifiers are increasingly used to identify qualified candidates in a variety of selection processes.

Fairness

Counterfactual Explanations in Sequential Decision Making Under Uncertainty

1 code implementation NeurIPS 2021 Stratis Tsirtsis, Abir De, Manuel Gomez-Rodriguez

In this work, we initiate the development of methods to find counterfactual explanations for decision making processes in which multiple, dependent actions are taken sequentially over time.

counterfactual Counterfactual Explanation +2

Group Testing under Superspreading Dynamics

1 code implementation30 Jun 2021 Stratis Tsirtsis, Abir De, Lars Lorch, Manuel Gomez-Rodriguez

Testing is recommended for all close contacts of confirmed COVID-19 patients.

Bridging Machine Learning and Mechanism Design towards Algorithmic Fairness

no code implementations12 Oct 2020 Jessie Finocchiaro, Roland Maio, Faidra Monachou, Gourab K Patro, Manish Raghavan, Ana-Andreea Stoica, Stratis Tsirtsis

Decision-making systems increasingly orchestrate our world: how to intervene on the algorithmic components to build fair and equitable systems is therefore a question of utmost importance; one that is substantially complicated by the context-dependent nature of fairness and discrimination.

BIG-bench Machine Learning Decision Making +1

Quantifying the Effects of Contact Tracing, Testing, and Containment Measures in the Presence of Infection Hotspots

2 code implementations15 Apr 2020 Lars Lorch, Heiner Kremer, William Trouleau, Stratis Tsirtsis, Aron Szanto, Bernhard Schölkopf, Manuel Gomez-Rodriguez

Multiple lines of evidence strongly suggest that infection hotspots, where a single individual infects many others, play a key role in the transmission dynamics of COVID-19.

Bayesian Optimization Point Processes

Decisions, Counterfactual Explanations and Strategic Behavior

1 code implementation NeurIPS 2020 Stratis Tsirtsis, Manuel Gomez-Rodriguez

In this paper, our goal is to find policies and counterfactual explanations that are optimal in terms of utility in such a strategic setting.

counterfactual

Optimal Decision Making Under Strategic Behavior

1 code implementation22 May 2019 Stratis Tsirtsis, Behzad Tabibian, Moein Khajehnejad, Adish Singla, Bernhard Schölkopf, Manuel Gomez-Rodriguez

Using this characterization, we first show that, in general, we cannot expect to find optimal decision policies in polynomial time and there are cases in which deterministic policies are suboptimal.

Decision Making

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