Online Decisions with (Biased) Offline Data

Hyun-Soo Ahn
Hyun-Soo Ahn
[email protected]
https://orcid.org/0000-0002-8103-4477
Stephen M. Ross School of Business, University of Michigan, Ann Arbor, Michigan 48109
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Mengzhenyu Zhang
Corresponding Author
Mengzhenyu Zhang
[email protected]
https://orcid.org/0000-0002-6069-576X
School of Management, University College London, London E14 5AA, United Kingdom
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Zijin Zhang
Corresponding Author
Zijin Zhang
[email protected]
https://orcid.org/0009-0003-9789-1128
Carroll School of Management, Boston College, Chestnut Hill, Massachusetts 02467
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Hyun-Soo Ahn

[email protected]

https://orcid.org/0000-0002-8103-4477

Stephen M. Ross School of Business, University of Michigan, Ann Arbor, Michigan 48109

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,

Mengzhenyu Zhang

Corresponding Author

Mengzhenyu Zhang

[email protected]

https://orcid.org/0000-0002-6069-576X

School of Management, University College London, London E14 5AA, United Kingdom

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,

Corresponding Author

Zijin Zhang

[email protected]

https://orcid.org/0009-0003-9789-1128

Carroll School of Management, Boston College, Chestnut Hill, Massachusetts 02467

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Published Online:15 Oct 2026https://doi.org/10.1287/opre.2025.2135

Supplemental Material

opre.2025.2135.sm1.pdf

opre.2025.2135.cd.zip

cover image Operations Research

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Received:July 18, 2025
Accepted:August 19, 2026
Published Online:October 15, 2026

Copyright © 2026, INFORMS

Cite as

Hyun-Soo Ahn, Mengzhenyu Zhang, Zijin Zhang (2026) Online Decisions with (Biased) Offline Data. Operations Research 0(0).

https://doi.org/10.1287/opre.2025.2135

Keywords

Acknowledgments

The authors thank the area editor, Xi Chen, anonymous associate editor, and two reviewers for constructive and insightful comments that significantly improved the paper. In particular, the authors thank both reviewers for encouraging us to broaden the generality of the paper, including by considering more general distance metrics for the newsvendor problem and various parametric forms for the pricing problem.