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Vassilis DIGALAKIS

Assistant Professor

Information Systems and Operations Management

 Profile picture

Biography

Vassilis Digalakis Jr is an Assistant Professor of Operations Management at the Information Systems and Operations Management Department at HEC Paris, affiliated with Hi! Paris and GREGHEC. He completed his Ph.D. in Operations Research at MIT in 2023, advised by Prof. Dimitris Bertsimas. His research develops analytics and interpretable machine learning methodologies to facilitate the adoption of data-driven decision support tools in high-stakes applications, primarily in sustainability and healthcare. Vassilis has collaborated, among others, with OCP, the world's largest producer of phosphate and phosphate-based products, to develop an optimization framework that guides their 2 billion USD investment in solar panels and batteries; and with the Federal Emergency Management Agency to help them decide on locations for COVID-19 mass vaccination centers and state-level allocation policy.

To find out more, visit Vassilis' personal website https://vvdigalakis.github.io/.

Scientific articles

Slowly Varying Regression under Sparsity

Operations Research, Forthcoming, (in coll. with D. BERTSIMAS, M. L. LI, O. S. LAMI)

Decarbonizing OCP

Manufacturing & Service Operations Management, Forthcoming, (in coll. with D. Bertsimas, R. Cory-Wright)

Frequency Estimation in Data Streams: Learning the Optimal Hashing Scheme

IEEE Transactions on Knowledge and Data Engineering, 19 2023, vol. 35, n° 2, pp 1541-1553, (in coll. with D. Bertsimas)

Where to locate COVID-19 mass vaccination facilities?

Naval Research Logistics, Mars 2022, vol. 69, n° 2, pp 179-200, (in coll. with D. Bertsimas, A. Jacquillat, M. L. Li, A. Previero)

The backbone method for ultra-high dimensional sparse machine learning

Machine Learning, June 2022, vol. 111, pp 2161-2212, (in coll. with D. Bertsimas)

From predictions to prescriptions: A data-driven response to COVID-19

Health Care Management Science, June 2021, vol. 24, pp 253-272, (in coll. with D. Bertsimas, L. Boussioux, R. Cory-Wright, A. Delarue, A. Jacquillat, D. L. Kitane, G. Lukin, M. Li, L. Mingardi, O. Nohadani, A. Orfanoudaki, T. Papalexopoulos, I. Paskov, J. Pauphilet, O. S. Lami, B. Stellato, H. T. Bouardi, K. V. Carballo, H. Wiberg,)

Working papers

Decarbonizing OCP

Cahier de Recherche , 2022

Scientific articles

Frequency Estimation in Data Streams: Learning the Optimal Hashing Scheme

IEEE Transactions on Knowledge and Data Engineering, 19 2023, vol. 35, n° 2, pp 1541-1553, (in coll. with D. Bertsimas)

The backbone method for ultra-high dimensional sparse machine learning

Machine Learning, June 2022, vol. 111, pp 2161-2212, (in coll. with D. Bertsimas)

Where to locate COVID-19 mass vaccination facilities?

Naval Research Logistics, Mars 2022, vol. 69, n° 2, pp 179-200, (in coll. with D. Bertsimas, A. Jacquillat, M. L. Li, A. Previero)

From predictions to prescriptions: A data-driven response to COVID-19

Health Care Management Science, June 2021, vol. 24, pp 253-272, (in coll. with D. Bertsimas, L. Boussioux, R. Cory-Wright, A. Delarue, A. Jacquillat, D. L. Kitane, G. Lukin, M. Li, L. Mingardi, O. Nohadani, A. Orfanoudaki, T. Papalexopoulos, I. Paskov, J. Pauphilet, O. S. Lami, B. Stellato, H. T. Bouardi, K. V. Carballo, H. Wiberg,)

Working papers

Decarbonizing OCP

Cahier de Recherche , 2022

Education

  • Ph.D. in Operations Research, MIT, Massachusetts Institute of Technology - USA

Academic appointments

Academic Responsibilities at HEC

  • 2023- Assistant Professor, Information Systems and Operations Management HEC Paris
  • 2023- Member of GREGHEC, the joint research laboratory CNRS-HEC Paris, GREGHEC HEC Paris

Scientific Activities

Editorial activities

  • Reviewer for Operations Research, Manufacturing Service Operations Management, Journal of Machine Learning Research, INFORMS Journal on Computing, INFORMS Journal on Optimization

  • Conference organisation

  • 2021- INFORMS Annual Meeting Session Chair
  • Awards & honors

    • 2023 MIT ORC Best Student Paper Competition | Honorable Mention for Decarbonizing OCP" with Dimitris Bertsimas Ryan Cory-Wright
    • 2023 MSOM Practice-Based Research Competition | Finalist for Decarbonizing OCP" with Dimitris Bertsimas Ryan Cory-Wright by INFORMS