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- 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
Keywords: Real Estate Agents; Real Estate; Realtors; Broker Networks; Brokerage; Brokerage Commissions; ＂Brokerage Industry; Brokered Markets; Brokering; Brokers; Industrial Organization; Repeated Game Framework; ＂Repeated Games＂; Collusion; Antitrust; Microeconomics; Market Design; Theory; Game Theory; Real Estate Industry
Hatfield, John William, Scott Duke Kominers, and Richard Lowery. "Collusion in Brokered Markets." Journal of Finance 80, no. 3 (June 2025): 1417–1462.
- 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
Hatfield, John William, Scott Duke Kominers, and Richard Lowery. "Collusion in Brokered Markets." Harvard Business School Working Paper, No. 20-023, September 2019. (Revised July 2020.)
- November 2019
- Article
The Relevance of Broker Networks for Information Diffusion in the Stock Market
By: Marco Di Maggio, Francesco Franzoni, Amir Kermani and Carlo Sommavilla
This paper shows that the network of relationships between brokers and institutional investors shapes information diffusion in the stock market. We exploit trade-level data to show that central brokers gather information by executing informed trades, which is then... View Details
Keywords: Broker Networks; Institutional Investors; Asset Prices; Business and Shareholder Relations; Institutional Investing; Information; Knowledge Dissemination; Financial Markets; Asset Pricing
Di Maggio, Marco, Francesco Franzoni, Amir Kermani, and Carlo Sommavilla. "The Relevance of Broker Networks for Information Diffusion in the Stock Market." Journal of Financial Economics 134, no. 2 (November 2019): 419–446.
- January 2001
- Background Note
Online Brokers
By: Thomas R. Eisenmann and Alastair Brown
Describes online brokers, companies that use the Internet to help clients identify prospective trading partners and sometimes help their clients complete transactions. First, summarizes the various ways that online brokers create value for their clients. Then analyzes... View Details
Eisenmann, Thomas R., and Alastair Brown. "Online Brokers." Harvard Business School Background Note 801-307, January 2001.
- December 2023
- Article
Brokerage Relationships and Analyst Forecasts: Evidence from the Protocol for Broker Recruiting
By: Braiden Coleman, Michael Drake, Joseph Pacelli and Brady Twedt
In this study, we offer novel evidence on how the nature of brokerage-client relationships can influence the quality of equity research. We exploit a unique setting provided by the Protocol for Broker Recruiting to examine whether relaxed broker non-compete agreement... View Details
Keywords: Brokers; Analysts; Forecasts; Bias; Protocol; Investment; Research; Forecasting and Prediction
Coleman, Braiden, Michael Drake, Joseph Pacelli, and Brady Twedt. "Brokerage Relationships and Analyst Forecasts: Evidence from the Protocol for Broker Recruiting." Review of Accounting Studies 28, no. 4 (December 2023): 2075–2103.
The Relevance of Broker Networks for Information Diffusion in the Stock Market
This paper shows that the network of relationships between brokers and institutional investors shapes the information diffusion in the stock market. We exploit trade-level data to show that trades channeled through central brokers earn significantly positive... View Details
- 03 Nov 2011
- News
Oversight Of Brokers Scrutinized
- 17 Jul 2017
- Working Paper Summaries
The Relevance of Broker Networks for Information Diffusion in the Stock Market
- Article
The Value of Intermediation in the Stock Market
By: Marco Di Maggio, Mark Egan and Francesco Franzoni
We estimate a structural model of broker choice to quantitatively decompose the value that institutional investors attach to broker services. Studying over 300 million institutional equity trades, we find that investors are sensitive to both explicit and implicit... View Details
Keywords: Financial Intermediation; Institutional Investors; Research Analysts; Broker Networks; Equity Trading; Institutional Investing
Di Maggio, Marco, Mark Egan, and Francesco Franzoni. "The Value of Intermediation in the Stock Market." Journal of Financial Economics 145, no. 2A (August 2022): 208–233.
- May 2018 (Revised June 2018)
- Case
Ashar Group: Brokers and Co-opetition in the Life Settlement Industry
By: Alexander Braun, Lauren H. Cohen, Christopher J. Malloy and Jiahua Xu
Connecting life insurance policyholders with potential investors (called Life Settlement Providers), Ashar Group plays a pivotal role in the industry. Its current position is, however, increasingly being challenged by consumer-direct models, led by major providers... View Details
Keywords: Insurance; Investment; Markets; Competitive Strategy; Cooperation; Financial Services Industry
Braun, Alexander, Lauren H. Cohen, Christopher J. Malloy, and Jiahua Xu. "Ashar Group: Brokers and Co-opetition in the Life Settlement Industry." Harvard Business School Case 218-109, May 2018. (Revised June 2018.)
- 2021
- Working Paper
The Value of Intermediation in the Stock Market
By: Marco Di Maggio, Mark Egan and Francesco Franzoni
We estimate a structural model of broker choice to quantitatively decompose the value that institutional investors attach to broker services. Studying over 300 million institutional equity trades, we find that investors are sensitive to both explicit and implicit... View Details
Keywords: Financial Intermediation; Institutional Investors; Research Analysts; Broker Networks; Equity Trading; Institutional Investing; Financial Services Industry
Di Maggio, Marco, Mark Egan, and Francesco Franzoni. "The Value of Intermediation in the Stock Market." Harvard Business School Working Paper, No. 20-016, August 2019. (Revised June 2021. Accepted at the Journal of Financial Economics.)
- February 2019
- Article
The Market for Financial Adviser Misconduct
By: Mark Egan, Gregor Matvos and Amit Seru
We construct a novel database containing the universe of financial advisers in the United States from 2005 to 2015, representing approximately 10% of employment of the finance and insurance sector. We provide the first large-scale study that documents the economy-wide... View Details
Keywords: Financial Advisors; Brokers; Consumer Finance; Financial Misconduct And Fraud; FINRA; Financial Institutions; Crime and Corruption; Organizational Culture; Personal Finance; Financial Services Industry
Egan, Mark, Gregor Matvos, and Amit Seru. "The Market for Financial Adviser Misconduct." Journal of Political Economy 127, no. 1 (February 2019): 233–295.
- December 2022
- Article
Conflicting Interests and the Effect of Fiduciary Duty: Evidence from Variable Annuities
By: Mark Egan, Shan Ge and Johnny Tang
We examine the variable annuity market to study conflicts of interest and the effect of fiduciary duty in brokerage markets. Insurers typically pay brokers higher commissions for selling more expensive annuities. Our results indicate that sales are four times as... View Details
Keywords: Variable Annuity; Brokers; Fiduciary Duty; Finance; Investment; Insurance; Conflict of Interests; Financial Services Industry; Insurance Industry; United States
Egan, Mark, Shan Ge, and Johnny Tang. "Conflicting Interests and the Effect of Fiduciary Duty: Evidence from Variable Annuities." Review of Financial Studies 35, no. 12 (December 2022): 5334–5386.
- Web
General Merchants to Commodities Brokers | Baker Library | Bloomberg Center | Harvard Business School
Introduction 1840s – 1880s General Merchants to Commodities Brokers 1880s – 1920s Investment Banking & Securities Underwriting 1920s – 1960s Investing in Emerging Industries 1850–1968 Lehman Brothers Family Partners 1960s – 2000s... View Details
- 16 Jul 2014
- HBS Case
Marketing Obamacare
healthcare legislation in the US ensured that it would be complex and tough to sell to the public, Quelch says. But that was just the problem: Congress and the Obama Administration didn't sell it. "Fundamentally, it's a marketing... View Details
- 05 Sep 2019
- Working Paper Summaries
The Value of Intermediation in the Stock Market
- Research Summary
Market Triads: A Theoretical and Empirical Analysis of Market Intermediation (Journal for the Theory of Social Behavior, June 2002)
By: Rakesh Khurana
This paper examines the role of executive search firms in CEO search. The paper argues that the numerical shift from two party market transactions (e.g. buyers and sellers) to three party transactions (e.g. buyers, sellers, and third party) transforms market exchanges... View Details
- 2021
- Working Paper
Trade and the Single Car Market: The EC-Japan Elements of Consensus, 1985–1999
By: Grace Ballor
In 1991, in the midst of the program to create a liberal Single European Market and in the context of a new Joint Declaration for cooperation with Japan, the European Commission brokered a private deal to restrict Japanese imports into the European Community for nearly... View Details
Keywords: Market; Protectionism; Liberalization; Trade; Markets; International Relations; Auto Industry; Europe; European Union; Japan
Ballor, Grace. "Trade and the Single Car Market: The EC-Japan Elements of Consensus, 1985–1999." Harvard Business School Working Paper, No. 21-145, June 2021.
- March 2023
- Article
Not from Concentrate: Collusion in Collaborative Industries
By: Jordan M. Barry, John William Hatfield, Scott Duke Kominers and Richard Lowery
The chief principle of antitrust law and theory is that reducing market concentration—having more, smaller firms instead of fewer, bigger ones—reduces anticompetitive behavior. We demonstrate that this principle is fundamentally incomplete.
In many... View Details
In many... View Details
Keywords: Antitrust; Antitrust Law; Antitrust Theory; Law And Economics; Collusion; Collaboration; Collaborative Industries; Regulation; ＂Repeated Games＂; IPOs; Initial Public Offerings; Underwriters; Real Estate; Real Estate Agents; Realtors; Syndicated Markets; Syndication; Brokers; Market Concentration; Competition; Law; Economics; Collaborative Innovation and Invention; Governing Rules, Regulations, and Reforms; Game Theory; Initial Public Offering
Barry, Jordan M., John William Hatfield, Scott Duke Kominers, and Richard Lowery. "Not from Concentrate: Collusion in Collaborative Industries." Iowa Law Review 108, no. 3 (March 2023): 1089–1148.
- 2014
- Working Paper
Price Coherence and Adverse Intermediation
By: Benjamin Edelman and Julian Wright
Suppose an intermediary provides a benefit to buyers when they purchase from sellers using the intermediary's technology. We develop a model to show that the intermediary will want to restrict sellers from charging buyers more for transactions it intermediates. We show... View Details
Keywords: Intermediaries; Platforms; Two-Sided Markets; Price Coherence; Price; Two-Sided Platforms; Distribution Channels
Edelman, Benjamin, and Julian Wright. "Price Coherence and Adverse Intermediation." Harvard Business School Working Paper, No. 14-052, December 2013. (Revised March 2014. Supplemental appendix.)