Cesare Barbera

Cesare Barbera

PhD Candidate in Artificial Intelligence

University of Pisa

University of Trento

Some due introductions

I am a PhD candidate in Artificial Intelligence at the University of Pisa, and I work with the Structured Machine Learning Group at the University of Trento.

My research focuses on uncertainty quantification and reliable machine learning, with particular interests in probabilistic calibration, conformal prediction, and human-AI decision making. More broadly, I am interested in developing the next generation of uncertainty-aware, trustworthy and human-centric AI frameworks.

I am always happy to chat about research, possible collaborations or interesting ideas, so feel free to reach out.

Interests

Uncertainty Quantification Probabilistic Calibration Conformal Prediction Reliable Machine Learning Human-AI Decision Making
Publications
News
October 2026

“A CaLLM Judge is a Better Judge: Mitigating Bias in LLM-as-a-judge” is on arXiv

Our work on mitigating bias in LLM-as-a-judge systems is now available on arXiv.

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September 2026

“Should I Stay or Should I Show? Learning to Selectively Disclose Information” is on arXiv

Our work on learning when to selectively disclose information to decision-makers is now available on arXiv.

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September 2026

“Divide et Calibra: Multiclass Local Calibration via Vector Quantization” accepted at NeurIPS 2026

Our work on stable local calibration via discrete representations was accepted at NeurIPS 2026.

September 2026

Presented “Elementary, My Dear Classifier: Interpretable Hypothesis Exclusion with Conformal Anchors” at HLDM 2026

Presented our work on interpretable, rule-based label exclusion with conformal prediction at the HLDM workshop at ECML PKDD 2026.

May 2026

Presented “Multiclass Local Calibration with the Jensen–Shannon Distance”, “On the Global and Local Calibration of Graph Neural Networks”, and “Divide et Calibra: Multiclass Local Calibration via Vector Quantization” at AISTATS 2026

At AISTATS 2026 I presented and discussed three of our calibration papers during the poster sessions.

January 2026

A preliminary version of “Divide et Calibra: Multiclass Local Calibration via Vector Quantization” accepted at the AISTATS 2026 calibration workshop

A preliminary version of our work on stable local calibration via discrete representations was accepted at the AISTATS 2026 workshop on trustworthy calibration.

January 2026

“On the Global and Local Calibration of Graph Neural Networks” accepted at the AISTATS 2026 calibration workshop

Our work on global and local calibration in graph neural networks was accepted at the AISTATS 2026 workshop on trustworthy calibration.

January 2026

“Multiclass Local Calibration with the Jensen–Shannon Distance” accepted at AISTATS 2026

Our work on consistent multiclass local calibration with LocalNets was accepted at AISTATS 2026.

October 2025

“Multiclass Local Calibration with the Jensen–Shannon Distance” is on arXiv

Our work on consistent multiclass local calibration with LocalNets is now available on arXiv.

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October 2025

“Disparities in Multilingual LLM-Based Healthcare Q&A” is on arXiv

Our work on cross-lingual disparities in multilingual LLM-based healthcare Q&A is now available on arXiv.

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October 2025

“To Ask or Not to Ask: Learning to Require Human Feedback” is on arXiv

Our work on when and how to incorporate expert feedback into ML models is now available on arXiv.

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September 2025

Presented “To Ask or Not to Ask: Learning to Require Human Feedback” at HLDM 2025

Presented our work on when and how to incorporate expert feedback in machine learning models at the HLDM workshop at ECML PKDD 2025.

September 2024

Presented “Interpretable and Efficient Counterfactual Generation with Disentangled Variational Autoencoders” at HLDM 2024

Presented our work on counterfactual generation and latent concept discovery via generative modelling at the HLDM workshop at ECML PKDD 2024.

Experience & Education

PhD in Artificial Intelligence

University of Pisa

Data Scientist Intern

Reale Mutua Assicurazioni

Data science internship at Reale Mutua Assicurazioni.

MSc in Data Science

University of Trento

BSc in Economics and Management

University of Trento

Grants & Awards
TANGO — Horizon Europe g.a. No. 101120763
Horizon Europe ∙ March 2023
Working on hybrid decision-making paradigms.
FAIR — Spoke 2 — Human-centric AI
FAIR ∙ March 2023
Research on interpretable and trustworthy machine learning (WP 2.8) under Prof. A. Passerini’s supervision.
National PhD Scholarship in Artificial Intelligence
National PhD in Artificial Intelligence ∙ March 2023
Awarded a national PhD scholarship in Artificial Intelligence, which led me to join the SML Research Group at the University of Trento, where I work on uncertainty quantification in machine learning.

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