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- Article
Stability and Competitive Equilibrium in Matching Markets with Transfers
By: John William Hatfield and Scott Duke Kominers
This note surveys recent work in generalized matching theory, focusing on trading networks with transferable utility. In trading networks with a finite set of contractual opportunities, the substitutability of agents’ preferences is essential for the guaranteed... View Details
Keywords: Matching; Networks; Joint Ventures; Stability; Competitive Equilibrium; Core; Efficiency; Economics; Theory
Hatfield, John William, and Scott Duke Kominers. "Stability and Competitive Equilibrium in Matching Markets with Transfers." ACM SIGecom Exchanges 10, no. 3 (December 2011).
- Article
Temporary General Equilibrium in a Sequential Trading Model with Spot and Futures Transactions
By: Jerry R. Green
The existence of an equilibrium is proven for a two-period model in which there are spot transactions and futures transactions in the first period and spot markets in the second period. Prices at that date are viewed with subjective uncertainty by all traders. This... View Details
Green, Jerry R. "Temporary General Equilibrium in a Sequential Trading Model with Spot and Futures Transactions." Econometrica 41, no. 6 (November 1973): 1103–1123.
- Article
Stability and Competitive Equilibrium in Trading Networks
By: John William Hatfield, Scott Duke Kominers, Alexandru Nichifor, Michael Ostrovsky and Alexander Westkamp
We introduce a model in which agents in a network can trade via bilateral contracts. We find that when continuous transfers are allowed and utilities are quasi-linear, the full substitutability of preferences is sufficient to guarantee the existence of stable outcomes... View Details
Hatfield, John William, Scott Duke Kominers, Alexandru Nichifor, Michael Ostrovsky, and Alexander Westkamp. "Stability and Competitive Equilibrium in Trading Networks." Journal of Political Economy 121, no. 5 (October 2013): 966–1001.
- September 1990
- Article
Competition on Many Fronts: A Stackelberg Signaling Equilibrium
By: Jerry R. Green and Jean-Jacques Laffont
An economic agent, the incumbent, is operating in many environments at the same time. These may be locations, markets, or specific activities. He is informed of the particular conditions relevant to each situation. His action in each case is observable by another... View Details
Green, Jerry R., and Jean-Jacques Laffont. "Competition on Many Fronts: A Stackelberg Signaling Equilibrium." Games and Economic Behavior 2, no. 3 (September 1990): 247–272.
- 1995
- Chapter
Dynamic General Equilibrium Models with Imperfectly Competitive Product Markets
By: Julio J. Rotemberg and Michael Woodford
- Research Summary
The Equilibrium Concept in Game Theory
By: Elon Kohlberg
Elon Kohlberg is studying the foundations of the equilibrium concept in game theory, which is to the study of economic systems what the notion of "equilibrium of forces" is to the study of mechanical systems. Although much of economic theory can be viewed in... View Details
- Forthcoming
- Article
Dynamic Competition for Customer Memberships
By: Cristian Chica, Julian Jimenez-Cardenas and Jorge Tamayo
A competitive two-period membership (subscription) market is analyzed. Two symmetric firms charge a “membership” fee that allows consumers to buy products or services at a given unit price for both periods. Firms can choose between long- or short-term memberships. When... View Details
Keywords: Competitive Price Discrimination; Membership; Dynamic Competition; Competition; Price; Consumer Behavior; Business Model
Chica, Cristian, Julian Jimenez-Cardenas, and Jorge Tamayo. "Dynamic Competition for Customer Memberships." Journal of Economics & Management Strategy (forthcoming). (Pre-published online August 12, 2024.)
- March 2014
- Article
Search Diversion and Platform Competition
By: Andrei Hagiu and Bruno Jullien
Platforms use search diversion in order to trade off total consumer traffic for higher revenues derived by exposing consumers to unsolicited products (e.g., advertising). We show that competition between platforms leads to lower equilibrium levels of search diversion... View Details
Keywords: Market Intermediation; Search; Two-Sided Markets; Platform Design; Platform Competition; Competition; Two-Sided Platforms
Hagiu, Andrei, and Bruno Jullien. "Search Diversion and Platform Competition." International Journal of Industrial Organization 33 (March 2014): 48–60.
- Article
Multilateral Matching
By: John William Hatfield and Scott Duke Kominers
We introduce a matching model in which agents engage in joint ventures via multilateral contracts. This approach allows us to consider production complementarities previously outside the scope of matching theory. We show analogues of the first and second welfare... View Details
Keywords: Matching; Stability; Competitive Equilibrium; Core; Networks; Competition; Joint Ventures; Balance and Stability; Groups and Teams; Entrepreneurship
Hatfield, John William, and Scott Duke Kominers. "Multilateral Matching." Journal of Economic Theory 156 (March 2015): 175–206.
- Article
Physician-Induced Demand for Medical Care
By: Jerry R. Green
This paper addresses the theoretical models designed to ascertain the existence of a variable level of physicians' activity in shifting the demand of their patients. Two basic approaches are followed: equilibrium models of the demand for health care, and disequilibrium... View Details
Keywords: Physicians; Economic Equilibrium; Monopolistic Competition; Economic Competition; Medical Care
Green, Jerry R. "Physician-Induced Demand for Medical Care." Special Issue on National Bureau of Economic Research Conference on the Economics of Physician and Patient Behavior. Journal of Human Resources 13, Suppl. (1978).
- 2024
- Working Paper
Open Source Software Policy in Industry Equilibrium
Open source software (OSS) is a form of public knowledge widely provided and relied on by the private sector. To study the effects of growing government involvement in this critical public good, I build a new empirical model where high-tech firms choose software inputs... View Details
Gortmaker, Jeff. "Open Source Software Policy in Industry Equilibrium." Working Paper, October 2024.
- November 2019
- Other Article
Corrigendum to "Multilateral Matching"
By: Keisuke Bando, Toshiyuki Hirai, John William Hatfield and Scott Duke Kominers
We identify an error in the claim by Hatfield and Kominers (2015) that every stable outcome in the setting of multilateral matching with contracts is efficient. We then show that the result can be recovered under a suitable differentiability condition. View Details
Keywords: Matching; Stability; Competitive Equilibrium; Networks; Joint Ventures; Balance and Stability
Bando, Keisuke, Toshiyuki Hirai, John William Hatfield, and Scott Duke Kominers. Corrigendum to "Multilateral Matching". Art. 104933. Journal of Economic Theory 184 (November 2019).
- 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
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.
- 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
Jagadeesan, Ravi, Scott Duke Kominers, and Ross Rheingans-Yoo. "Lone Wolves in Competitive Equilibria." Harvard Business School Working Paper, No. 18-055, January 2018.
- 2021
- Working Paper
Competitive Two-Part Tariffs
By: Jorge Tamayo and Guofu Tan
We study competitive two-part tariffs in a model of asymmetric duopoly firms that offer (vertically and horizontally) differentiated products. We show that the sign of the markup for each product depends on the average expected demand among all customers as well as the... View Details
Keywords: Product Differentiation; Two-part Tariffs; Marginal-cost Pricing; Cross-subsidization; Competition; Price
Tamayo, Jorge, and Guofu Tan. "Competitive Two-Part Tariffs." Harvard Business School Working Paper, No. 21-089, March 2021. (R&R American Economic Journal: Microeconomics.)
- 2023
- Working Paper
Crowding in Private Quality: The Equilibrium Effects of Public Spending in Education
By: Tahir Andrabi, Natalie Bau, Jishnu Das, Asim Ijaz Khwaja and Naureen Karachiwalla
We estimate the equilibrium effects of a public-school grant program administered through school councils in Pakistani villages with multiple public and private schools and clearly defined catchment boundaries. The program was randomized at the village-level, allowing... View Details
Andrabi, Tahir, Natalie Bau, Jishnu Das, Asim Ijaz Khwaja, and Naureen Karachiwalla. "Crowding in Private Quality: The Equilibrium Effects of Public Spending in Education." NBER Working Paper Series, No. 30929, February 2023.
- Article
The Wisdom of Competitive Crowds
By: Kenneth C. Lichtendahl, Yael Grushka-Cockayne and Phillip E. Pfeifer
When several individuals are asked to forecast an uncertain quantity, they often face implicit or explicit incentives to be the most accurate. Despite the desire to elicit honest forecasts, such competition induces forecasters to report strategically and nontruthfully.... View Details
Lichtendahl, Kenneth C., Yael Grushka-Cockayne, and Phillip E. Pfeifer. "The Wisdom of Competitive Crowds." Operations Research 61, no. 6 (November–December 2013): 1383–1398. (*Finalist in the Decision Analysis Society Publication Award, 2015.)
- September 2019
- Article
Trading Networks with Frictions
By: Tamás Fleiner, Ravi Jagadeesan, Zsuzsanna Jankó and Alexander Teytelboym
We show how frictions and continuous transfers jointly affect equilibria in a model of matching in trading networks. Our model incorporates distortionary frictions such as transaction taxes and commissions. When contracts are fully substitutable for firms, competitive... View Details
Keywords: Trading Networks; Frictions; Competitive Equilibrium; Matching With Contracts; Stability; Trail Stability
Fleiner, Tamás, Ravi Jagadeesan, Zsuzsanna Jankó, and Alexander Teytelboym. "Trading Networks with Frictions." Econometrica 87, no. 5 (September 2019): 1633–1661.
- 2011
- Working Paper
The Impact of Horizontal Mergers and Acquisitions in Price Competition Models
The question of what impact mergers and acquisitions have on key equilibrium performance measures is fundamental to our understanding of competitive dynamics in an oligopolistic industry. We address these questions in the context of price competition models with... View Details
Keywords: Mergers and Acquisitions; Cost; Price; Profit; Duopoly and Oligopoly; Performance Efficiency; Mathematical Methods; Competition
Federgruen, Awi, and Margaret P. Pierson. "The Impact of Horizontal Mergers and Acquisitions in Price Competition Models." Harvard Business School Working Paper, No. 12-031, October 2011.
- 2011
- Working Paper
Price Competition under Multinomial Logit Demand Functions with Random Coefficients
In this paper, we postulate a general class of price competition models with Mixed Multinomial Logit demand functions under affine cost functions. We first characterize the equilibrium behavior of this class of models in the case where each product in the market is... View Details
Keywords: Customers; Income Characteristics; Price; Product Marketing; Mathematical Methods; Competition; Segmentation
Allon, Gad, Awi Federgruen, and Margaret Pierson. "Price Competition under Multinomial Logit Demand Functions with Random Coefficients." Harvard Business School Working Paper, No. 12-030, October 2011.