Publications

Research Summary

Dynamics of Platform Competition: Exploring the Role of Installed Base, Platform Quality and Consumer Expectations

Researchers debate the role of installed base, platform quality and consumer expectations in driving the success of platforms. We analyze these three factors in a dynamic model where a new entrant with superior quality competes with an incumbent platform, and... View Details

March 2023 (Revised September 2023)
Case

Patagonia: 'Earth Is Now Our Only Shareholder'

By: Brian Trelstad, Nien-hê Hsieh, Michael Norris and Susan Pinckney

In September 2022, Yvon Chouinard, the iconoclastic founder of outdoor apparel company Patagonia, announced a new ownership model for his company. Chouinard and his family had held complete control of the company's voting and non-voting stock since its founding 50... View Details

Research Summary

Output and asset price fluctuations

What are the sources of business cycles? How are these shocks propagated in the economy? Why are their effects so persistent? How can we explain asset price fluctuations? How are shocks transmitted internationally?To study these questions, I have developed a series... View Details

10 Jan 2011
Research & Ideas

Is Groupon Good for Retailers?

Explain the theoretical model you describe in your paper and how it can help retailers decide whether a voucher service like Groupon makes sense for them. A: We present a model of online View Details

Keywords: by Carmen Nobel; Advertising; Technology

Article

Analyzing Scrip Systems

By: Kris Johnson, David Simchi-Levi and Peng Sun

Scrip systems provide a nonmonetary trade economy for exchange of resources. We model a scrip system as a stochastic game and study system design issues on selection rules to match potential trade partners over time. We show the optimality of one particular rule in... View Details

Keywords: ＂Repeated Games＂; Stochastic Trust Game; Dynamic Program; P2P Lending; Scrip Systems; Artificial Currency; Non-monetary Trade Economies; Marketplace Matching; Currency; Operations; Game Theory

August 2011 (Revised July 2014)
Case

Social Innovation at Salesforce.com

By: Christopher Marquis, Marley C. Kornreich and Bobbi Thomason

Salesforce.com recently implemented an innovative social enterprise business model whereby the Salesforce.com Foundation funds its operations and grant budget by selling discounted salesforce.com software licenses to nonprofits and education clients. The case recounts... View Details

Keywords: Innovation and Invention; Corporate Entrepreneurship; Corporate Social Responsibility and Impact; Business Model; Information Technology; Leading Change; Problems and Challenges

02 Aug 2024
HBS Case

How a Mission to Cut Food Waste Launched a Multimillion-Dollar Venture

On a hectic Friday in October 2016, Josh Domingues wondered if he had made a mistake quitting the security of a well-paying job managing contracts for professional hockey players to start a new venture selling nearly expired groceries at discount prices. After all, a... View Details

Keywords: by Lane Lambert; Technology; Information Technology

2007
Working Paper

Dynamics of Platform Competition: Exploring the Role of Installed Base, Platform Quality and Consumer Expectations

By: Feng Zhu and Marco Iansiti

This paper seeks to answer three questions. First, which drives the success of a platform, installed base, platform quality or consumer expectations? Second, when does a monopoly emerge in a platform-based market? Finally, when is a platform-based market socially... View Details

Keywords: Price; Network Effects; Digital Platforms; Monopoly; Quality; Competitive Advantage; Digital Platforms

June 2025
Article

Collusion in Brokered Markets

By: John William Hatfield, Scott Duke Kominers and Richard Lowery

High commissions in the U.S. residential real estate agency market present a puzzle for economic theory because brokerage is not a concentrated industry. We model brokered markets as a game in which agents post prices for customers and then choose which other agents to... View Details

SSRN

2020
Working Paper

Collusion in Brokered Markets

By: John William Hatfield, Scott Duke Kominers and Richard Lowery

The U.S. residential real estate agency market presents a puzzle for economic theory: commissions on real estate transactions have remained high for decades even though entry is frequent and costs are low. We model the real estate agency market, and other brokered... View Details

Keywords: Real Estate; ＂Repeated Games＂; Collusion; Antitrust; Brokered Markets; Game Theory; Real Estate Industry

SSRN

2022
Working Paper

Intertemporal Altruism

By: Felix Chopra, Armin Falk and Thomas Graeber

Most prosocial decisions involve intertemporal tradeoffs. Yet, the timing of prosocial utility flows is ambiguous and bypassed by most models of other-regarding preferences. We study the behavioral implications of the time structure of prosocial utility,... View Details

Keywords: Altruism; Donation; Intertemporal Decision-making; Time Inconsistency

2023
Working Paper

Complexity and Time

By: Benjamin Enke, Thomas Graeber and Ryan Oprea

We provide experimental evidence that core intertemporal choice anomalies -- including extreme short-run impatience, structural estimates of present bias, hyperbolicity and transitivity violations -- are driven by complexity rather than time or risk preferences. First,... View Details

Keywords: Decision Choices and Conditions; Motivation and Incentives

March–April 2014
Article

Do Bonuses Enhance Sales Productivity? A Dynamic Structural Analysis of Bonus-Based Compensation Plans

By: Doug J. Chung, Thomas Steenburgh and K. Sudhir

We estimate a dynamic structural model of sales force response to a bonus based compensation plan. Substantively, the paper sheds insights on how different elements of the compensation plan enhance productivity. We find evidence that: (1) bonuses enhance productivity... View Details

Keywords: Performance Productivity; Salesforce Management; Compensation and Benefits

October 2022 (Revised August 2024)
Case

Cigna-Express Scripts: Can a Vertical Merger Rescue an Industry Under Attack?

By: Leemore Dafny

In Fall 2019, Cigna Corporation – a global health services company with a significant presence in the U.S. employer-sponsored health insurance market - was digesting its $54 billion acquisition of Express Scripts, Inc. (ESI), a pharmacy benefit manager (PBM)... View Details

Keywords: Mergers and Acquisitions; Business Model; Vertical Integration; Insurance Industry

Article

Bargaining with Imperfect Enforcement

By: Lucy White and Mark Williams

The game-theoretic bargaining literature insists on non-cooperative bargaining procedure but allows 'cooperative' implementation of agreements. The effect of this is to allow free-reign of bargaining power with no check upon it. In reality, courts cannot... View Details

Keywords: Agreements and Arrangements; Body of Literature; Contracts; Motivation and Incentives; Code Law; Game Theory

August 2020 (Revised February 2021)
Case

Luckin Coffee (A): Caffeine-fueled Growth?

By: Ramon Casadesus-Masanell and Karen Elterman

This case describes the founding of Chinese coffee chain Luckin Coffee in 2017 and its path to surpassing Starbucks as the largest coffee chain in China (by number of stores) in 2019. Unlike Starbucks stores, which were designed to be welcoming “third places” for... View Details

May–June 2018
Article

Data Uncertainty in Markov Chains: Application to Cost-Effectiveness Analyses of Medical Innovations

By: Joel Goh, Mohsen Bayati, Stefanos A. Zenios, Sundeep Singh and David Moore

Cost-effectiveness studies of medical innovations often suffer from data inadequacy. When Markov chains are used as a modeling framework for such studies, this data inadequacy can manifest itself as imprecision in the elements of the transition matrix. In this paper,... View Details

Keywords: Markov Chains; Cost Effectiveness; Medical Innovations; Colorectal Cancer; Health Care and Treatment; Cost vs Benefits; Innovation and Invention; Mathematical Methods; Health Industry