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      • Faculty Publications  (24)

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      • 2025
      • Working Paper

      Prices and Concentration: A U-shape? Theory and Evidence from Renewables

      By: Michele Fioretti, Junnan He and Jorge Tamayo
      We show that when firms compete via supply functions, transferring high-cost capacity to the largest, most efficient firm—thereby diversifying its production technologies while increasing concentration—can lower prices by prompting the leader to expand output and... View Details
      Keywords: Diversified Production Technologies; Concentration Levels; Market Power; Supply Function Equilibrium; Hydropower; Energy Transition; Renewable Energy; Price; Competition; Supply and Industry; Energy Industry; Colombia
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      Fioretti, Michele, Junnan He, and Jorge Tamayo. "Prices and Concentration: A U-shape? Theory and Evidence from Renewables." Harvard Business School Working Paper, No. 25-049, April 2025.
      • 2024
      • Article

      Half the Firms, Double the Profits: Public Firms' Transformation, 1996–2022

      By: Mark J. Roe and Charles C.Y. Wang
      The number of public firms in the United States has halved since the beginning of the twenty-first century, causing consternation among corporate and securities law regulators. The dominant explanations, often advanced by Securities and Exchange commissioners when... View Details
      Keywords: Corporate Law; Securities Regulation; Sarbanes-Oxley Act; Concentration Levels; Antitrust; Initial Public Offering; Public Ownership; Private Equity; Venture Capital; Mergers and Acquisitions; Monopoly; United States
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      Roe, Mark J., and Charles C.Y. Wang. "Half the Firms, Double the Profits: Public Firms' Transformation, 1996–2022." Journal of Law, Finance, and Accounting 8, no. 2 (2024): 211–264.
      • December 2023
      • Article

      What Can Stockouts Tell Us About Inflation? Evidence from Online Micro Data

      By: Alberto Cavallo and Oleksiy Kryvtsov
      We use a detailed micro dataset on product availability and stockouts to construct a direct high-frequency measure of consumer product shortages during the 2020-2022 pandemic. We document a widespread multi-fold rise in stockouts in nearly all sectors early in the... View Details
      Keywords: Prices; Stockouts; Inventories; Supply Disruptions; COVID-19 Pandemic; Supply Chain; Product; Demand and Consumers
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      Cavallo, Alberto, and Oleksiy Kryvtsov. "What Can Stockouts Tell Us About Inflation? Evidence from Online Micro Data." Journal of International Economics 146 (December 2023).
      • 2023
      • Working Paper

      The Party and Firm

      By: Joris Mueller, Jaya Y. Wen and Cheryl Wu
      This project documents the rise of the Chinese Communist Party’s influence on firms in China over the last decade. We propose novel quantitative measures of Party influence and present recent trends in those measures. We corroborate qualitative work and find a sharp... View Details
      Keywords: Business and Government Relations; Economic Systems; Power and Influence; Government Administration; Policy; China
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      Mueller, Joris, Jaya Y. Wen, and Cheryl Wu. "The Party and Firm." Working Paper, December 2023.
      • 2022
      • Report

      The First Four Healthy Building Strategies Every Building Should Pursue to Reduce Risk from COVID-19

      By: Joseph G. Allen, Emily Jones, Marissa V. Rainbolt, Linsey C. Marr, David Michaels, Leslie R. Cadet, Shelly L. Miller, Meira Levinson, Lidia Morawska, Richard L. Corsi, Nira R. Pollock, Yuguo Li, Alasdair P.S. Munro, Kelly Grier, Qingyan Chen, John D. Macomber and Xiaodong Cao
      Understanding of the most probable transmission routes and identifying the risk environments for disease spread should always be among the first critical steps in the response to future disease threats. This is one of the most vital public health lessons of the... View Details
      Keywords: Health Pandemics; Buildings and Facilities; Risk and Uncertainty; Health Industry; Education Industry; Real Estate Industry
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      Allen, Joseph G., Emily Jones, Marissa V. Rainbolt, Linsey C. Marr, David Michaels, Leslie R. Cadet, Shelly L. Miller, Meira Levinson, Lidia Morawska, Richard L. Corsi, Nira R. Pollock, Yuguo Li, Alasdair P.S. Munro, Kelly Grier, Qingyan Chen, John D. Macomber, and Xiaodong Cao. "The First Four Healthy Building Strategies Every Building Should Pursue to Reduce Risk from COVID-19." Report, Lancet COVID-19 Commission, Task Force on Safe School, Safe Work, Safe Travel, July 2022. (COVID-19 Commission.)
      • October 2020
      • Article

      Collusion in Markets with Syndication

      By: John William Hatfield, Scott Duke Kominers, Richard Lowery and Jordan M. Barry
      Markets for IPOs and debt issuances are syndicated, in the sense that a bidder who wins a contract may invite losing bidders to join a syndicate that together fulfills the contract. We show that in markets with syndication, standard intuitions from industrial... View Details
      Keywords: Collusion; Antitrust; IPO Underwriting; Syndication; "Repeated Games"; Markets; Game Theory
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      Hatfield, John William, Scott Duke Kominers, Richard Lowery, and Jordan M. Barry. "Collusion in Markets with Syndication." Journal of Political Economy 128, no. 10 (October 2020).
      • April 2020
      • Article

      Technological Leadership (de)Concentration: Causes in Information and Communication Technology Equipment

      By: Yasin Ozcan and Shane Greenstein
      Using patent data from 1976 to 2010 as indicators of inventive activity, we determine the concentration level of where inventive ideas originate and then examine how and why those concentrations change over time. The analysis finds pervasive deconcentration in every... View Details
      Keywords: Deconcentration; Technological Innovation; Innovation Leadership; Patents; Market Entry and Exit; Telecommunications Industry
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      Ozcan, Yasin, and Shane Greenstein. "Technological Leadership (de)Concentration: Causes in Information and Communication Technology Equipment." Industrial and Corporate Change 29, no. 2 (April 2020): 241–263. (Winner of the Industry Studies Association 2021 Ralph Gomory Award for Best Paper.)
      • 2019
      • Working Paper

      On Her Own Account: How Strengthening Women's Financial Control Affects Labor Supply and Gender Norms

      By: Natalia Rigol, Erica Field, Rohini Pande, Simone Schaner and Charity Troyer-Moore
      Can greater control over earned income incentivize women to work and influence gender norms? In collaboration with Indian government partners, we provided rural women with individual bank accounts and randomly varied whether their wages from a public workfare program... View Details
      Keywords: Gender Norms; Economics; Gender; Employment; Income; Societal Protocols; India
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      Rigol, Natalia, Erica Field, Rohini Pande, Simone Schaner, and Charity Troyer-Moore. "On Her Own Account: How Strengthening Women's Financial Control Affects Labor Supply and Gender Norms." NBER Working Paper Series, No. 26294, September 2019.
      • 2019
      • Chapter

      Spatial Agglomeration and Superstar Firms: Firm-level Patterns from Europe and U.S.

      By: Laura Alfaro, Maggie X. Chen and Harald Fadinger
      We characterize the agglomeration patterns of industries and plants in Europe, distinguishing Eurozone countries and the United States. Using a micro-level index, we quantify the degree of geographic concentration in industrial activities and explore how firm... View Details
      Keywords: Agglomeration; Patterns; Industry Clusters; Europe; United States
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      Alfaro, Laura, Maggie X. Chen, and Harald Fadinger. "Spatial Agglomeration and Superstar Firms: Firm-level Patterns from Europe and U.S." In ECB Forum on Central Banking, 17-19 June 2019, Sintra, Portugal: 20 years of European Economic and Monetary Union: Conference Proceedings. Frankfurt: European Central Bank, 2019.
      • 2019
      • Working Paper

      Collusion in Markets with Syndication

      By: John William Hatfield, Scott Duke Kominers, Richard Lowery and Jordan M. Barry
      Many markets, including markets for IPOs and debt issuances, are syndicated: each winning bidder invites competitors to join its syndicate to complete production. Using repeated extensive form games, we show that collusion in syndicated markets may become easier as... View Details
      Keywords: Collusion; Antitrust; IPO Underwriting; Syndication; "Repeated Games"
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      Hatfield, John William, Scott Duke Kominers, Richard Lowery, and Jordan M. Barry. "Collusion in Markets with Syndication." Harvard Business School Working Paper, No. 18-009, July 2017. (Revised June 2019.)
      • April 2017
      • Supplement

      Imprimis (D)

      By: Ramon Casadesus-Masanell, Karen Elterman and Marc Appel
      This case is a supplement to Imprimis (A, B, & C). It describes Imprimis’s 2015 decision to develop a $1 per pill compounded alternative to Daraprim, the branded drug that had recently undergone an extreme price hike, raising its price to $750 per pill. Imprimis also... View Details
      Keywords: Decision Choices and Conditions; Growth and Development Strategy; Pharmaceutical Industry; United States
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      Casadesus-Masanell, Ramon, Karen Elterman, and Marc Appel. "Imprimis (D)." Harvard Business School Supplement 717-498, April 2017.
      • 2016
      • Working Paper

      Collusion in Markets with Syndication

      By: John William Hatfield, Scott Kominers and Richard Lowery
      Markets for IPOs and debt issuances are syndicated, in the sense that a bidder who wins a contract may invite losing bidders to join a syndicate that together fulfills the contract. We show that in markets with syndication, standard intuitions from... View Details
      Keywords: Collusion; Antitrust; IPO Underwriting; Syndication; "Repeated Games"
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      Hatfield, John William, Scott Kominers, and Richard Lowery. "Collusion in Markets with Syndication." Working Paper, November 2016.
      • 2015
      • Working Paper

      Informal Tradables and the Employment Growth of Indian Manufacturing

      By: Ejaz Ghani, William R. Kerr and Alexander Segura
      India's manufacturing growth from 1989 to 2010 displays two intriguing properties: 1) a substantial fraction of absolute and net employment growth is concentrated in informal tradable industries, and 2) much of this growth is connected to the development of one-person... View Details
      Keywords: Manufacturing; India; Informality; Small And Medium-sized Enterprises; Development Economics; Manufacturing Industry; India
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      Ghani, Ejaz, William R. Kerr, and Alexander Segura. "Informal Tradables and the Employment Growth of Indian Manufacturing." World Bank Policy Research Working Paper, No. 7206, March 2015.
      • August 2012
      • Article

      A Darker Side to Decentralized Banks: Market Power and Credit Rationing in SME Lending

      By: Rodrigo Canales and Ramana Nanda
      We use loan-level data to study how the organizational structure of banks impacts small business lending. We find that decentralized banks-where branch managers have greater autonomy over lending decisions-give larger loans to small firms and those with "soft... View Details
      Keywords: Geographic Location; Customers; Financing and Loans; Credit; Organizational Structure; Banks and Banking; Governance Compliance; Competitive Strategy
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      Canales, Rodrigo, and Ramana Nanda. "A Darker Side to Decentralized Banks: Market Power and Credit Rationing in SME Lending." Journal of Financial Economics 105, no. 2 (August 2012): 353–366.
      • December 2011
      • Article

      Data Impediments to Empirical Work on Health Insurance Markets

      By: Leemore S. Dafny, David Dranove, Frank Limbrock and Fiona Scott Morton
      We compare four datasets that researchers might use to study competition in the health insurance industry. We show that the two datasets most commonly used to estimate market concentration differ considerably from each other (both in levels and in changes over time),... View Details
      Keywords: Competition; Analytics and Data Science; Market Participation; Insurance Industry
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      Dafny, Leemore S., David Dranove, Frank Limbrock, and Fiona Scott Morton. "Data Impediments to Empirical Work on Health Insurance Markets." B.E. Journal of Economic Analysis & Policy 11, no. 2 (December 2011).
      • February 2010
      • Case

      Applied Research Technologies, Inc.: Global Innovation's Challenges

      By: Christopher A. Bartlett and Heather Beckham
      Applied Research Technologies, Inc. (ART) is a diversified technology company which has used its entrepreneurial culture and encouragement of innovation as an ongoing competitive advantage. The case concentrates on the challenges faced by Peter Vyas, the Filtration... View Details
      Keywords: Management Style; Managerial Roles; Management Practices and Processes; Reputation; Organizational Culture; Innovation and Management; Competitive Advantage; Entrepreneurship; Management Systems; Cross-Cultural and Cross-Border Issues; Technology Industry
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      Bartlett, Christopher A., and Heather Beckham. "Applied Research Technologies, Inc.: Global Innovation's Challenges." Harvard Business School Brief Case 104-168, February 2010.
      • 2008
      • Working Paper

      A Darker Side to Decentralized Banks: Market Power and Credit Rationing in SME Lending

      By: Rodrigo Canales and Ramana Nanda
      We use loan-level data to study how the organizational structure of banks impacts small business lending. We find that decentralized banks—where branch managers have greater autonomy over lending decisions—give larger loans to small firms and those with "soft... View Details
      Keywords: Organizational Structure; Financing and Loans; Industry Structures; Banks and Banking; Banking Industry; Mexico
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      Canales, Rodrigo, and Ramana Nanda. "A Darker Side to Decentralized Banks: Market Power and Credit Rationing in SME Lending." Harvard Business School Working Paper, No. 08-101, June 2008. (Revised January 2011, August 2011.)
      • August 2007 (Revised November 2010)
      • Case

      Grand Central Publishing

      By: Anita Elberse
      In April 2007, Grand Central's publisher Jamie Raab and editor Karen Kosztolnyik were involved in a frantic bidding war for a proposed book on the life of cat Dewey, billed as the feline answer to the best-selling "Marley & Me: Life and Love with the World's Worst... View Details
      Keywords: Acquisition; Product Launch; Bids and Bidding; Product Development; Publishing Industry
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      Elberse, Anita. "Grand Central Publishing." Harvard Business School Case 508-036, August 2007. (Revised November 2010.)
      • 2007
      • Working Paper

      Interpersonal Authority in a Theory of the Firm

      By: Eric J. Van den Steen
      This paper develops a theory of the firm in which a firm's centralized asset ownership and low-powered incentives give a manager 'interpersonal authority' over employees (in a world with differing priors). The paper derives such interpersonal authority as... View Details
      Keywords: Governance Controls; Employee Relationship Management; Managerial Roles; Motivation and Incentives; Boundaries; Theory
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      Van den Steen, Eric J. "Interpersonal Authority in a Theory of the Firm." Sloan School of Management Working Paper, No. 4667-07, July 2007. (Available at SSRN.)
      • 2008
      • Working Paper

      The Ethnic Composition of U.S. Inventors

      By: William R. Kerr
      The ethnic composition of US scientists and engineers is undergoing a significant transformation. This study applies an ethnic-name database to individual patent records granted by the United States Patent and Trademark Office to document these trends with greater... View Details
      Keywords: Inventors; Scientists; Engineers; Information Technology; Patents; Ethnicity; Innovation and Invention; Research and Development; Immigration; China; United States; India
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      Kerr, William R. "The Ethnic Composition of U.S. Inventors." Harvard Business School Working Paper, No. 08-006, May 2007. (Permanent working paper describing ethnic-name patenting data, revised December 2008.)
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