Will Ma

Columbia University - Columbia Business School, Decision Risk and Operations

Associate Professor

New York, NY

United States

  • Columbia University - Columbia Business School, Decision Risk and Operations

SCHOLARLY PAPERS

15

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Rank 12,782

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Top 12,782

in Total Papers Downloads

7,919

TOTAL CITATIONS
Rank 17,125

SSRN RANKINGS

Top 17,125

in Total Papers Citations

60

Scholarly Papers (15)

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1.

The Benefits of Delay to Online Decision-Making

Forthcoming in Management Science
Number of pages: 47 Posted: 20 Oct 2022 Last Revised: 03 Dec 2024
Yaqi Xie, Will Ma and Linwei Xin
University of Chicago - Booth School of Business, Columbia University - Columbia Business School, Decision Risk and Operations and University of Chicago - Booth School of Business
Downloads 1,349 (31,410)

Abstract:

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online decision-making, resource allocation, delay, batching, multisecretary problem, order fulfillment, multi-item order

2.

Assortment Planning for Recommendations at Checkout under Inventory Constraints

Mathematics of Operations Research (Forthcoming)
Number of pages: 35 Posted: 17 Oct 2016 Last Revised: 13 Mar 2023
Xi Chen, Will Ma, David Simchi-Levi and Linwei Xin
New York University (NYU) - Leonard N. Stern School of Business, Columbia University - Columbia Business School, Decision Risk and Operations, Massachusetts Institute of Technology (MIT) - School of Engineering and University of Chicago - Booth School of Business
Downloads 1,317 (32,571)
Citation 7

Abstract:

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revenue management; assortment optimization; personalized recommendation; online algorithms; competitive ratio

3.

Algorithms for Online Matching, Assortment, and Pricing with Tight Weight-Dependent Competitive Ratios

Number of pages: 54 Posted: 20 Jun 2017 Last Revised: 01 Nov 2021
Will Ma and David Simchi-Levi
Columbia University - Columbia Business School, Decision Risk and Operations and Massachusetts Institute of Technology (MIT) - School of Engineering
Downloads 925 (53,927)
Citation 21

Abstract:

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Online Algorithms, Competitive Ratio, Revenue Management, Online Matching, Adwords, Booking Limits

4.

Learning Valuation Distributions from Bundle Sales

Number of pages: 44 Posted: 27 Mar 2016 Last Revised: 04 Nov 2023
Will Ma and David Simchi-Levi
Columbia University - Columbia Business School, Decision Risk and Operations and Massachusetts Institute of Technology (MIT) - School of Engineering
Downloads 722 (75,262)

Abstract:

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bundling, valuation learning, revenue management

5.

Beyond IID: data-driven decision making in heterogeneous environments

Columbia Business School Research Paper No. 4140928
Number of pages: 86 Posted: 27 Jun 2022 Last Revised: 01 Jan 2025
Omar Besbes, Will Ma and Omar Mouchtaki
Columbia University - Columbia Business School, Decision Risk and Operations, Columbia University - Columbia Business School, Decision Risk and Operations and New York University (NYU) - Leonard N. Stern School of Business
Downloads 625 (90,401)
Citation 3

Abstract:

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data-driven algorithms, distribution shift, distributionally robust optimization, minimax regret, sample average approximation, pricing, newsvendor, ski-rental

6.

Dynamic Pricing (and Assortment) under a Static Calendar

Management Science
Number of pages: 71 Posted: 26 Oct 2018 Last Revised: 23 Nov 2020
Will Ma, David Simchi-Levi and Jinglong Zhao
Columbia University - Columbia Business School, Decision Risk and Operations, Massachusetts Institute of Technology (MIT) - School of Engineering and Boston University - Questrom School of Business
Downloads 404 (153,684)
Citation 2

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revenue management, dynamic pricing, dynamic assortment

7.

Distributionally Robust Linear and Discrete Optimization with Marginals

Number of pages: 65 Posted: 27 Apr 2018 Last Revised: 14 Sep 2019
Louis Chen, Will Ma, Karthik Natarajan, David Simchi-Levi and Zhenzhen Yan
Massachusetts Institute of Technology (MIT), Operations Research Center, Students, Columbia University - Columbia Business School, Decision Risk and Operations, Singapore University of Technology and Design (SUTD), Massachusetts Institute of Technology (MIT) - School of Engineering and Nanyang Technological University
Downloads 400 (155,459)
Citation 13

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Robust Optimization, Discrete Optimization, Optimal Transport

8.

Leveraging the degree of Dynamic Substitution in Assortment and Inventory Planning

Number of pages: 47 Posted: 24 Apr 2023 Last Revised: 19 Sep 2024
Jingwei Zhang, Will Ma and Huseyin Topaloglu
The Chinese University of Hong Kong, Shenzhen, Columbia University - Columbia Business School, Decision Risk and Operations and Cornell University - School of Operations Research and Information Engineering
Downloads 393 (158,509)

Abstract:

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assortment optimization, multinomial logit model, fluid approximation

9.

From Contextual Data to Newsvendor Decisions: On the Actual Performance of Data-Driven Algorithms

Columbia Business School Research Paper No. 4361470
Number of pages: 59 Posted: 21 Feb 2023 Last Revised: 24 Dec 2024
Omar Besbes, Will Ma and Omar Mouchtaki
Columbia University - Columbia Business School, Decision Risk and Operations, Columbia University - Columbia Business School, Decision Risk and Operations and New York University (NYU) - Leonard N. Stern School of Business
Downloads 385 (162,230)

Abstract:

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data-driven stochastic optimization, empirical risk minimization, k-nearest neighbors, contextual newsvendor, worst-case regret

10.

Multi-Stage and Multi-Customer Assortment Optimization With Inventory Constraints

Number of pages: 62 Posted: 30 Aug 2019 Last Revised: 27 Jul 2020
Elaheh Fata, Will Ma and David Simchi-Levi
Queen's University - Smith School of Business, Columbia University - Columbia Business School, Decision Risk and Operations and Massachusetts Institute of Technology (MIT) - School of Engineering
Downloads 342 (184,876)
Citation 2

Abstract:

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Assortment Optimization, Online Matching, Online Marketplaces, Online Advertising

11.

Reaping the Benefits of Bundling under High Production Costs

Number of pages: 40 Posted: 08 Dec 2015 Last Revised: 10 Sep 2016
Will Ma and David Simchi-Levi
Columbia University - Columbia Business School, Decision Risk and Operations and Massachusetts Institute of Technology (MIT) - School of Engineering
Downloads 298 (214,122)
Citation 7

Abstract:

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revenue management, monopolist pricing, bundling, marketing, Bayesian mechanism design

12.

VC Theory for Inventory Policies

Number of pages: 47 Posted: 16 Apr 2024 Last Revised: 07 Aug 2024
Yaqi Xie, Will Ma and Linwei Xin
University of Chicago - Booth School of Business, Columbia University - Columbia Business School, Decision Risk and Operations and University of Chicago - Booth School of Business
Downloads 285 (224,409)

Abstract:

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VC theory, Pseudo-dimension, data-driven algorithm design, generalization bound, estimation error, sample complexity, shattering, inventory, base-stock policy, (s, S) policy, less is more

13.

Real-Time Personalized Order Holding

Number of pages: 52 Posted: 01 Dec 2023 Last Revised: 24 Dec 2024
Mohammad Reza Aminian, Will Ma and Linwei Xin
University of Chicago - Booth School of Business, Columbia University - Columbia Business School, Decision Risk and Operations and University of Chicago - Booth School of Business
Downloads 233 (274,616)
Citation 1

Abstract:

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order holding, consolidation, personalization, index-based policies, online algorithms, competitive ratio, e-commerce, fulfillment, online allocation, online scheduling, reusable resources, cloud computing

14.

Inventory Balancing with Online Learning

Number of pages: 59 Posted: 02 Sep 2018 Last Revised: 30 Aug 2021
Wang Chi Cheung, Will Ma, David Simchi-Levi and Xinshang Wang
Institute of High Performance Computing, Agency for Science, Technology and Research (A*STAR), Columbia University - Columbia Business School, Decision Risk and Operations, Massachusetts Institute of Technology (MIT) - School of Engineering and Alibaba Group
Downloads 125 (472,586)
Citation 2

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15.

The Competitive Ratio of Threshold Policies for Online Unit-density Knapsack Problems

Number of pages: 41 Posted: 22 Jul 2019 Last Revised: 12 Sep 2024
Will Ma, David Simchi-Levi and Jinglong Zhao
Columbia University - Columbia Business School, Decision Risk and Operations, Massachusetts Institute of Technology (MIT) - School of Engineering and Boston University - Questrom School of Business
Downloads 116 (500,516)
Citation 2

Abstract:

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Wholesale, supply chain ordering, knapsack problem, online algorithms