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  • All HBS Web  (189)
    • News  (15)
    • Research  (165)
  • Faculty Publications  (108)

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  • All HBS Web  (189)
    • News  (15)
    • Research  (165)
  • Faculty Publications  (108)
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  • 2008
  • Working Paper

Stability and Nash Implementation in Matching Markets with Couples

By: Claus-Jochen Haake and Bettina-Elisabeth Klaus
We consider two-sided matching markets with couples. First, we extend a result by Klaus and Klijn (2005, Theorem 3.3) and show that for any weakly responsive couples market there always exists a "double stable" matching, i.e., a matching that is stable for the couples... View Details
Keywords: Marketplace Matching; Balance and Stability; Game Theory
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Haake, Claus-Jochen, and Bettina-Elisabeth Klaus. "Stability and Nash Implementation in Matching Markets with Couples." Harvard Business School Working Paper, No. 09-017, August 2008.
  • 17 Mar 2011
  • Working Paper Summaries

Marketplace Institutions Related to the Timing of Transactions

Keywords: by Alvin E. Roth
  • 25 May 2018
  • Working Paper Summaries

Trust and Disintermediation: Evidence from an Online Freelance Marketplace

Keywords: by Grace Gu and Feng Zhu; Service
  • July 2021
  • Article

Outsourcing Tasks Online: Matching Supply and Demand on Peer-to-Peer Internet Platforms

By: Zoë Cullen and Chiara Farronato
We study the growth of online peer-to-peer markets. Using data from TaskRabbit, an expanding marketplace for domestic tasks at the time of our study, we show that growth varies considerably across cities. To disentangle the potential drivers of growth, we look... View Details
Keywords: Two-sided Market; Two-sided Platforms; Peer-to-peer Markets; Platform Strategy; Sharing Economy; Platform Growth; Internet and the Web; Digital Platforms; Strategy; Market Design; Network Effects
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Cullen, Zoë, and Chiara Farronato. "Outsourcing Tasks Online: Matching Supply and Demand on Peer-to-Peer Internet Platforms." Management Science 67, no. 7 (July 2021): 3985–4003.
  • December 2024
  • Article

Respect for Improvements and Comparative Statics in Matching Markets

By: Scott Duke Kominers
One of the oldest results in the theory of two-sided matching is the entry comparative static, which shows that under the Gale–Shapley deferred acceptance algorithm, adding a new agent to one side of the market makes all the agents on the other side weakly... View Details
Keywords: Market Entry and Exit; Marketplace Matching; Mathematical Methods; Market Design
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Kominers, Scott Duke. "Respect for Improvements and Comparative Statics in Matching Markets." Journal of Mechanism and Institution Design 9, no. 1 (December 2024): 83–104.
  • 2008
  • Working Paper

Unravelling in Two-Sided Matching Markets and Similarity of Preferences

By: Hanna Halaburda
This paper investigates the causes and welfare consequences of unravelling in two-sided matching markets. It shows that similarity of preferences is an important factor driving unravelling. In particular, it shows that under the ex-post stable mechanism (the mechanism... View Details
Keywords: Market Participation; Two-Sided Platforms; Marketplace Matching; Mathematical Methods
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Halaburda, Hanna. "Unravelling in Two-Sided Matching Markets and Similarity of Preferences." Harvard Business School Working Paper, No. 09-068, November 2008.
  • January 8, 2025
  • Article

Why Retailers Are Turning to Third-Party Marketplaces

By: Antonio Moreno
Some traditional retailers—including Walmart, Target, and Best Buy—are adopting third-party marketplaces, which connect customers with external sellers and thereby offer customers a much broader selection. Many other traditional retailers are considering whether to... View Details
Keywords: Marketplace Matching; Distribution Channels; Customer Focus and Relationships; Cost vs Benefits; Retail Industry
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Moreno, Antonio. "Why Retailers Are Turning to Third-Party Marketplaces." Harvard Business Review Digital Articles (January 8, 2025).
  • Article

An Invitation to Market Design

By: Scott Duke Kominers, Alexander Teytelboym and Vincent P. Crawford
Market design seeks to translate economic theory and analysis into practical solutions to real-world problems. By redesigning both the rules that guide market transactions and the infrastructure that enables those transactions to take place, market designers can... View Details
Keywords: Matching; Trading; Scrip; Liquidity; Efficiency; Equity; Allocation Rules; Marketplaces; Market Design; Marketplace Matching; Auctions
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Kominers, Scott Duke, Alexander Teytelboym, and Vincent P. Crawford. "An Invitation to Market Design." Oxford Review of Economic Policy 33, no. 4 (Winter 2017): 541–571.
  • January 2018 (Revised February 2018)
  • Technical Note

Making Markets

By: Thomas R. Eisenmann and Scott Duke Kominers
Explains how to identify and capitalize on marketplace design opportunities. Defines markets and marketplaces and describes the basic functions of each. Discusses attributes (e.g., heterogeneity of participants' preferences and asymmetry in available information) that... View Details
Keywords: Marketplaces; Two-Sided Markets; Entrepreneurship; Market Design; Digital Platforms; Marketplace Matching; Market Participation; Market Transactions; Market Entry and Exit; Digital Platforms; Auctions
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Eisenmann, Thomas R., and Scott Duke Kominers. "Making Markets." Harvard Business School Technical Note 818-096, January 2018. (Revised February 2018.)
  • June 2008
  • Article

Current State of Fellowship Hiring: Is a Universal Match Necessary? Is It Possible?

By: Christopher D. Harner, Anil S. Ranawat, Muriel Niederle, Alvin E. Roth, Peter J. Stern, Shepard R. Hurwitz, William Levine, G. Paul DeRosa and Serena S. Hu
Currently, approximately ninety percent of the six hundred twenty graduating orthopaedic residents are planning on entering a post-graduate fellowship. Since January of 2005, two of the largest fellowship match programs, Sports Medicine and Spine Surgery, were... View Details
Keywords: Medical Specialties; Recruitment; Selection and Staffing; Employment; Market Timing; Marketplace Matching; Health Industry
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Harner, Christopher D., Anil S. Ranawat, Muriel Niederle, Alvin E. Roth, Peter J. Stern, Shepard R. Hurwitz, William Levine, G. Paul DeRosa, and Serena S. Hu. "Current State of Fellowship Hiring: Is a Universal Match Necessary? Is It Possible?" Journal of Bone and Joint Surgery: American Volume 90 (June 2008): 1375–1384.
  • 2010
  • Working Paper

Manipulability in Matching Markets: Conflict and Coincidence of Interests

We study comparative statics of manipulations by women in the men-proposing deferred acceptance mechanism in the two-sided one-to-one marriage market. We prove that if a group of women employs truncation strategies or weakly successfully manipulates, then all other... View Details
Keywords: Conflict of Interests; Marketplace Matching; Two-Sided Platforms
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Ashlagi, Itai, and Flip Klijn. "Manipulability in Matching Markets: Conflict and Coincidence of Interests." Harvard Business School Working Paper, No. 10-111, June 2010.
  • 2014
  • Working Paper

Hidden Substitutes

By: John William Hatfield and Scott Duke Kominers
In this paper, we show that preferences exhibiting some forms of complementarity in fact have an underlying substitutable structure. Specifically, we show that some preferences that are not substitutable in the setting of many-to-one matching with contracts become... View Details
Keywords: Many-to-One Matching; Many-to-Many Matching; Stability; Substitutes; Matching With Contracts; Slot-Specific Priorities; Sherlock; Market Design; Contracts; Marketplace Matching; Balance and Stability
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Hatfield, John William, and Scott Duke Kominers. "Hidden Substitutes." Working Paper, September 2014.
  • August 2020
  • Article

Lone Wolves in Competitive Equilibria

By: Ravi Jagadeesan, Scott Duke Kominers and Ross Rheingans-Yoo
This paper develops a class of equilibrium-independent predictions of competitive equilibrium with indivisibilities. Specifically, we prove an analogue of the “Lone Wolf Theorem” of classical matching theory, showing that when utility is perfectly transferable, any... View Details
Keywords: Indivisibilities; Matching; Lone Wolf Theorem; Marketplace Matching; Theory
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Jagadeesan, Ravi, Scott Duke Kominers, and Ross Rheingans-Yoo. "Lone Wolves in Competitive Equilibria." Social Choice and Welfare 55, no. 2 (August 2020): 215–228.
  • 1990
  • Chapter

Two-Sided Matching Markets: An Overview of Some Theory and Empirical Evidence

By: A. E. Roth
Keywords: Marketplace Matching; Two-Sided Platforms; Mathematical Methods
Citation
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Roth, A. E. "Two-Sided Matching Markets: An Overview of Some Theory and Empirical Evidence." In Game Theory and Applications, edited by T. Ichiishi, A. Neyman, and Y. Tauman, 232–251. San Diego: Academic Press, 1990.
  • September 2019
  • Article

Optimizing Reserves in School Choice: A Dynamic Programming Approach

By: Franklyn Wang, Ravi Jagadeesan and Scott Duke Kominers
We introduce a new model of school choice with reserves in which a social planner is constrained by a limited supply of reserve seats and tries to find an optimal matching according to a social welfare function. We construct the optimal distribution of reserves via a... View Details
Keywords: Matching; Reserves; Dynamic Programming; Marketplace Matching; Mathematical Methods
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Wang, Franklyn, Ravi Jagadeesan, and Scott Duke Kominers. "Optimizing Reserves in School Choice: A Dynamic Programming Approach." Operations Research Letters 47, no. 5 (September 2019): 438–446.
  • 2017
  • Working Paper

Lone Wolves in Competitive Equilibria

By: Ravi Jagadeesan, Scott Duke Kominers and Ross Rheingans-Yoo
This paper develops a class of equilibrium-independent predictions of competitive equilibrium with indivisibilities. Specifically, we prove an analogue of the “Lone Wolf Theorem” of classical matching theory, showing that when utility is perfectly transferable, any... View Details
Keywords: Indivisibilities; Matching; Lone Wolf Theorem; Marketplace Matching; Theory
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Jagadeesan, Ravi, Scott Duke Kominers, and Ross Rheingans-Yoo. "Lone Wolves in Competitive Equilibria." Harvard Business School Working Paper, No. 18-055, January 2018.
  • 2016
  • Article

Peer-to-Peer Markets

By: Liran Einav, Chiara Farronato and Jonathan Levin
Peer-to-peer markets such as eBay, Uber, and Airbnb allow small suppliers to compete with traditional providers of goods or services. We view the primary function of these markets as making it easy for buyers to find sellers and engage in convenient, trustworthy... View Details
Keywords: Peer-to-peer; Online Platforms; Matching; Innovation; Digital Platforms; Marketplace Matching; Market Design; Internet and the Web; Technology Adoption; Network Effects; Market Entry and Exit
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Einav, Liran, Chiara Farronato, and Jonathan Levin. "Peer-to-Peer Markets." Annual Review of Economics 8 (2016): 615–635.
  • 2013
  • Working Paper

Competing by Restricting Choice: The Case of Search Platforms

By: Hanna Halaburda and Mikolaj Jan Piskorski
Seminal papers recommend that platforms in two-sided markets increase the number of complements available. We show that a two-sided platform can successfully compete by limiting the choice of potential matches it offers to its customers while charging higher prices... View Details
Keywords: Matching Platform; Indirect Network Effects; Limits To Network Effects; Decision Choices and Conditions; Network Effects; Two-Sided Platforms; Marketplace Matching; Competitive Strategy
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Halaburda, Hanna, and Mikolaj Jan Piskorski. "Competing by Restricting Choice: The Case of Search Platforms." Harvard Business School Working Paper, No. 10-098, May 2010. (Revised June 2010, March 2011, August 2011, March 2013.)
  • May 2021
  • Article

Stability, Strategy-Proofness, and Cumulative Offer Mechanisms

By: John William Hatfield, Scott Duke Kominers and Alexander Westkamp
We consider the setting of many-to-one matching with contracts, where firms may demand multiple contracts, but each worker desires at most one contract. We introduce three novel conditions—observable substitutability, observable size monotonicity, and... View Details
Keywords: Matching With Contracts; Stability; Strategy-proofness; Substitutability; Size Monotonicity; Cumulative Offer Mechanism; Marketplace Matching; Balance and Stability
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Hatfield, John William, Scott Duke Kominers, and Alexander Westkamp. "Stability, Strategy-Proofness, and Cumulative Offer Mechanisms." Review of Economic Studies 88, no. 3 (May 2021): 1457–1502.
  • Article

Testing Substitutability

By: John William Hatfield, Nicole Immorlica and Scott Duke Kominers
We provide an algorithm for testing the substitutability of a length-N preference relation over a set of contracts X in time O(|X|3⋅N3). Access to the preference relation is essential for this result: We show that a substitutability-testing algorithm with access only... View Details
Keywords: Substitutability; Matching; Communication Complexity; Preference Elicitation; Marketplace Matching; Communication; Mathematical Methods; Economics
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Hatfield, John William, Nicole Immorlica, and Scott Duke Kominers. "Testing Substitutability." Games and Economic Behavior 75, no. 2 (July 2012): 639–645.
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