Will Ma

Columbia University - Columbia Business School, Decision Risk and Operations

Associate Professor

New York, NY

United States

SCHOLARLY PAPERS

15

DOWNLOADS
Rank 13,865

SSRN RANKINGS

Top 13,865

in Total Papers Downloads

6,712

SSRN CITATIONS
Rank 18,293

SSRN RANKINGS

Top 18,293

in Total Papers Citations

64

CROSSREF CITATIONS

12

Scholarly Papers (15)

1.

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
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 1,256 (31,400)
Citation 7

Abstract:

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

2.

The Benefits of Delay to Online Decision-Making

Number of pages: 43 Posted: 20 Oct 2022 Last Revised: 21 Feb 2023
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 1,014 (42,733)

Abstract:

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

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 911 (49,583)
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 665 (75,234)

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: 64 Posted: 27 Jun 2022 Last Revised: 15 Sep 2023
Columbia University - Columbia Business School, Decision Risk and Operations, Columbia University - Columbia Business School, Decision Risk and Operations and Columbia University - Columbia Business School, Decision Risk and Operations
Downloads 514 (103,807)
Citation 3

Abstract:

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data-driven algorithms; robust optimization; 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
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 378 (148,559)
Citation 2

Abstract:

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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
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 365 (154,510)
Citation 12

Abstract:

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Robust Optimization, Discrete Optimization, Optimal Transport

8.

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 293 (195,296)
Citation 7

Abstract:

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

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: 46 Posted: 21 Feb 2023 Last Revised: 13 Feb 2024
Columbia University - Columbia Business School, Decision Risk and Operations, Columbia University - Columbia Business School, Decision Risk and Operations and Columbia University - Columbia Business School, Decision Risk and Operations
Downloads 281 (203,869)

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
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 281 (203,869)
Citation 2

Abstract:

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Assortment Optimization, Online Matching, Online Marketplaces, Online Advertising

11.

Leveraging the degree of Dynamic Substitution in Assortment and Inventory Planning

Number of pages: 47 Posted: 24 Apr 2023 Last Revised: 01 Apr 2024
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 242 (236,593)

Abstract:

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assortment optimization, multinomial logit model, fluid approximation

12.

Real-Time Personalized Order Holding

Number of pages: 46 Posted: 01 Dec 2023
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 169 (328,523)
Citation 1

Abstract:

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order holding, consolidation, personalization, index-based policies, online algorithms, competitive ratio, e-commerce, fulfillment

13.

VC Theory for Inventory Policies

Number of pages: 45 Posted: 16 Apr 2024 Last Revised: 21 Apr 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 133 (401,938)

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

14.

Inventory Balancing with Online Learning

Number of pages: 59 Posted: 02 Sep 2018 Last Revised: 30 Aug 2021
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 110 (460,961)
Citation 2

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15.

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

Number of pages: 37 Posted: 22 Jul 2019 Last Revised: 05 Nov 2019
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 100 (493,001)
Citation 2

Abstract:

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online knapsack, competitive ratio, online approximation algorithms