We focus on research that concerns antitrust policy, economic regulation, and market design. Questions of interest include the following:

How should we regulate horizontal and/or vertical mergers? Is there a trade-off between short run market power and longer run investment incentives?
How should we respond to departures from the competitive ideal in markets; with imperfect information, that are highly concentrated, that are natural monopolies, or that generate externalities resulting from knowledge producing activities?
How should centralized markets (like health insurance exchanges, kidney exchanges, and school choice mechanisms) be organized?
What is the optimal design of auctions to procure services for the government, such as highway construction contracts, or to sell government assets, such as spectrum or mineral rights?
How can policy makers detect and deter collusion?
How should patent policy be designed?

Latest articles

Informality, Consumption Taxes, and Redistribution

Rich countries achieve significant redistribution via broad-based income taxes, but the income tax base covers only a fraction of the income distribution in developing countries, due in part to enforceability constraints (Jensen, 2022). Instead, developing countries rely primarily on indirect consumption taxes to collect revenue, such as the value-added tax (VAT), which are perceived as […]

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Connecting to power: How political connections can reduce innovation

Recently, researchers and policymakers have become concerned about the growing dominance of large firms, declining business dynamism, and slower productivity growth in the US and other OECD member countries (Decker et al. 2016; De Loecker and Eeckhout 2018). At the same time, political “rent-seeking” has increased (Zingales 2012; Bessen 2016). In the research we summarize […]

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Auctions versus negotiations in the real world

Asset owners often need to identify and choose between potential contracting partners to monetize their asset’s value. For example, companies that are acquisition targets may have multiple potential acquirers, and research institutions looking to commercialize intellectual property often decide among several interested parties. Many land transactions also look like this. How should an owner go […]

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Achieving Scale Collectively

Most firms in developing countries employ only a few workers, if any (Hsieh and Olken, 2014). A key policy concern is that their small size may prevent firms from adopting technology: technology is often embodied in large machines, and small firms might not have the scale to justify the investment. As a result, firms may […]

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Fighting brands, competition, and consumers

Understanding fighting brand strategies Johnson and Myatt (2003) developed a model of competition where firms can offer products that vary in quality. They showed that an incumbent monopoly active in a high-quality segment may have an incentive to launch a product in a low-quality segment only after new entry in that segment, and not before. […]

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The Long-Run Impact of Immigration on Local and Aggregate Productivity

Can increases in the size of the population raise productivity? There are ample theoretical reasons to believe that the answer to this question ought to be yes. Most theories of growth predict a positive relationship between innovation incentives and market size, and many models of international trade or development economics highlight the importance of agglomeration […]

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Hospital Network Competition and Adverse Selection: Evidence from the Massachusetts Health Insurance Exchange

The Affordable Care Act is one of the most significant health reforms in a generation. In addition to covering 15 million uninsured Americans, substantially expanding government health spending, and setting off a fierce political debate, the ACA is notable for an underappreciated reason: it is a major expansion of market-based health insurance. Traditionally, health insurance […]

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What happens when foreign firms expand local employment?

Data and Statistical Patterns The new study is the first to construct a panel data set linking all firms and workers in the U.S. with foreign ownership information on firms. To do so, we developed a worker-firm panel from the population of annual U.S. Treasury tax filings from 1999 to 2017. For each worker-firm-year combination, […]

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Should There Be Vertical Choice in Health Insurance Markets?

Are consumers on ACA exchanges actually made better off by having a choice between a high-deductible and a low-deductible health plan? Would U.K. citizens be better off if they could opt into accepting a deductible, in exchange for an up-front payment? The research summarized here introduces a framework for exploring such questions theoretically and empirically. […]

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Research lessons for practical school choice policy

Many cities use centralized school choice systems to assign students to schools. In centralized choice, students submit ranked lists of schools to a centralized authority. The authority then uses some combination of priorities (e.g., test scores or neighborhoods) and random tiebreakers to place each student in at most one school. Centralized choice systems help alleviate […]

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