Now showing items 1-20 of 651

    • How Epic v. Apple Operationalizes Ohio v. Amex

      Yun, John M. (Yale Journal on Regulation, 2025)
      The Supreme Court’s landmark decision in Ohio v. American Express (Amex) remains central to the enforcement of antitrust laws involving digital markets. The decision established a framework to assess business conduct involving transactional, multisided platforms from both an economic and legal perspective. At its crux, the Court in Amex integrated both the relevant market and competitive effects analysis across the two distinct groups who interact on the Amex platform; that is, cardholders and merchants. This unified, integrated approach has been controversial, however. The primary debate is whether the Court’s ruling places an undue burden on plaintiffs under the rule of reason paradigm to meet their burden of production to establish harm to competition. Enter Epic v. Apple (Epic): a case involving the legality of various Apple policies governing its iOS App Store, which, like Amex, is a transactional, multisided platform. While both the district court and the Ninth Circuit largely ruled in favor of Apple over Epic, these decisions are of broader interest for their fidelity to Amex. A careful review of the decisions reveals that the Epic courts operationalized Amex in a practical, sensible way. The courts did not engage in extensive balancing across developers and users as some critics of Amex contended would be required. Ultimately, the courts in Epic (a) considered evidence of effects across both groups on the platform and (b) gave equal weight to evidence of both the procompetitive and anticompetitive effects, which, this Article contends, are the essential elements of the Amex precedent. Relatedly, the Epic decisions illustrate that the burden of production on plaintiffs in multisided platform cases is not higher than in cases involving regular, single-sided markets. Additionally, both parties, whether litigating single-sided or multi-sided markets, are fully incentivized to bring evidence to bear on all aspects of the case. Finally, this Article details how the integrated Amex approach deftly avoids potential issues involving the out- of-market effects doctrine in antitrust, which limits what type of effects courts can consider in assessing conduct.
    • Lost-Premium Damages in M&A: Delaware’s New Legal Landscape

      Chan, Jonathan; Petrin, Martin (Yale Journal on Regulation, 2025)
      In the event of a buyer’s willful breach of a merger agreement, lost-premium provisions allow a target corporation to claim damages that include the lost premium or economic entitlements that its stockholders would have received had the deal closed. In the recent Crispo v. Musk decision the Delaware Chancery Court held these provisions to be unenforceable under the anti-penalty doctrine. In this Article we challenge the analysis in Crispo by arguing that lost-premium provisions are doctrinally defensible, economically sensible, and supported by policy considerations. Lost-premium provisions became enforceable in Delaware from August 1, 2024, following amendments to the Delaware General Corporation Law. But the issue may crop up again in other jurisdictions. This Article explains why courts in other states both can and should uphold lost-premium provisions.
    • Government Control over Qui Tam Suits and Separation of Powers

      Li, Tiffany (Yale Journal on Regulation, 2025)
      The False Claims Act’s qui tam provisions, authorizing private parties or relators to sue on behalf of the U.S. government, have faced renewed constitutional challenges despite record recoveries. Within the past two years, three Supreme Court Justices suggested qui tam may violate Article II of the Constitution, and a district court dismissed a qui tam lawsuit as unconstitutional. The Department of Justice has broad statutory authority to dismiss a qui tam case and veto any settlement or voluntary dismissal by a relator, allowing the Executive to maintain control over qui tam suits. But DOJ rarely exercises these rights, as empirical studies reveal. This Note highlights the disconnect between the importance of executive control over qui tam cases for the FCA’s constitutionality and DOJ’s infrequent oversight in practice. It proposes (1) amending the FCA to further DOJ incentives to dismiss by requiring non-intervened cases proceeding to have merits similar to government-initiated FCA cases and (2) resolving the circuit split in favor of broad government authority to object to a settlement between relator and defendant, weakening separation-of-powers challenges.
    • Contractual Control in Dual-Class Corporations

      Shobe, Gladriel; Shobe, Jarrod (Yale Journal on Regulation, 2025)
      Founders and other corporate insiders go to great lengths to control the companies they take public, and the mechanisms they use to maintain control have been a central theme of corporate law. Dual-class structures, which give insider shareholders voting rights that exceed their economic rights, are a common way for insiders to maintain post-IPO control. Scholars and policymakers have endlessly debated the costs and benefits of these structures, which have surged in popularity over the past 20 years. As one prominent scholar put it, dual-class structures are “[t]he most important issue in corporate governance today.”
    • Altering Rules: The New Frontier for Corporate Governance

      Rauterberg, Gabriel; Sanga, Sarath (Yale Journal on Regulation, 2025)
      Corporate law has taken a contractarian turn. Shareholders are increasingly contracting around its foundational rules—statutory rights, the fiduciary duty of loyalty, even the central role of the board—and Delaware courts are increasingly enforcing these contracts. In the one case where they did not, the legislature swiftly overruled the decision and adopted a new statutory provision permitting boards to completely cede their powers to a shareholder by contract. These developments have sparked a polarized debate, with some calling for a return to mandatory rules, while others push for total contractual freedom. We argue, however, that the best approach lies neither in rigid mandatory rules nor unchecked contractual freedom—but in recognizing the potential of corporate law’s altering rules. Altering rules define how parties can opt out of the default rules of governance. Our theory identifies corporate altering rules’ essential features, namely, whose consent is required to change a default (process) and who is bound by that decision (scope). We show that the central role of altering rules in corporate law is not simply to make changing a default more or less difficult, as is widely supposed, but rather to combine process and scope in ways that define distinct bargaining environments, shaping how insiders negotiate over governance. Corporate law can fine-tune these features in ways that both encourage contractual innovation and manage intra-corporate risks. In response to recent cases and legislation, we propose new altering mechanisms that will broaden decision-making to include non-signatory shareholders, protecting them from harmful externalities. Altering rules, as they exist now, represent only a fraction of their potential. Rethinking their design opens the door to a vast, largely unexplored landscape of possibilities that could guide corporate governance in its new era of contractual innovation.
    • Hiding in Plain Sight: ERISA’s Cure for the $1.4 Trillion Health Benefits Market

      Monahan, Amy B.; Richman, Barak D. (Yale Journal on Regulation, 2025)
      Since 1974, the Employee Retirement Income Security Act (ERISA) has imposed fiduciary duties on those who manage and administer employee benefit plans. But for the largest employee benefits—retirement benefits and health plans, which together constitute 13% of total national compensation—ERISA’s fiduciary duties have played very different roles. For retirement benefits, ERISA scrutinizes plan managers and requires employers to select plan investments with care. For health plans, there is a regulatory vacuum, as ERISA imposes few federal requirements yet preempts state efforts to ensure quality plan offerings. In short, ERISA has advanced protections for retirement plans but mostly curtailed protections for the nearly 165 million Americans who receive health insurance from employers. The tragedy is that health benefit plans are in dire need of regulatory scrutiny. The costs of health insurance have risen dramatically faster than inflation, cutting into worker take-home pay and inflicting disproportionate harm on middle- and lower-income workers, while the generosity of employer-provided plans has thinned. The sorry state of employer-sponsored health insurance is due, in part, to inattention and inadequate probity from the parties subject to ERISA’s fiduciary obligations. In sharp contrast, the efficiency and value of retirement benefits have improved over that same period. Because of what ERISA requires, and because of what managers of employee health benefits have failed to do, there is enormous opportunity to employ ERISA to enhance the value of health benefits for employees, which also means enhancing the value of the nation’s entire health sector. A handful of pioneering lawsuits have just started invoking ERISA to subject health benefits managers to fiduciary obligations, and more are certain to come. Now is the time for ERISA jurisprudence to confront the consequences of neglecting health insurance, for courts to consider what demands ERISA imposes on health benefits managers, and critically, for the Department of Labor to exercise its regulatory authority under ERISA and enforce fiduciary obligations that the statute imposes and the market sorely needs. This Article documents ERISA’s authority over health benefits managers, explains why ERISA litigation is on the upswing, and offers guidance on how the Department of Labor could establish regulatory safe harbors to bring accountability and predictability to the enormous health benefits marketplace.
    • The Public Law of Public Utilities

      Macey, Joshua C.; Richardson, Brian (Yale Journal on Regulation, 2025)
      This Article describes the constitutional history of public utility regulation to make sense of apparent puzzles and inconsistencies in modern administrative law. In chronicling this history, we first show that utilities’ special constitutional right to challenge regulations on substantive-due-process grounds is based on a public-private distinction that courts have otherwise rejected. Second, we argue that modern efforts to invoke Article III to restrict agency adjudication do not reflect a consistent understanding of the public-private distinction, but instead revive the distinction in some contexts (adjudication) but not others (rulemaking). Third, we provide a new framework for understanding the Supreme Court’s turn to structural arguments to check administrative agencies. On the last point: for nearly five decades prior to 1935, courts used rights-based arguments, not structural ones such as the nondelegation doctrine, to deduce the scope and content of the legislative, executive, and judicial powers. Once the Supreme Court abandoned its freedom-ofcontract jurisprudence, it was a public utility case that breathed new life into the nondelegation doctrine. Public utilities were a natural battle ground for reshaping the public law of administration. Like today, private rights, delegation, and agency adjudication were all central preoccupations of this public utility moment, but the frameworks courts advanced to answer these puzzles have vanished from our modern debate. Today’s administrative law thus reflects an ad hoc revival of public utility legal concepts, and it reinvents these concepts such that they bear little resemblance to their public utility genealogy.
    • Unfairness, Reconstructed

      Herrine, Luke (Yale Journal on Regulation, 2025)
      A paradigm shift is afoot at major federal consumer protection agencies. For four decades, a bipartisan bloc of bureaucrats has seen the purpose of consumer protection as promoting informed consumer choice or “consumer sovereignty.” The idea was that informed consumers in competitive markets would protect themselves by choosing among sellers. Ensuring access to information would then shore up markets’ self-correcting tendencies without requiring moral judgment. In the past few years, by contrast, regulators have prioritized sector-wide regulation, enforcement sweeps, and strategic cases against market leaders. They have justified their actions not (exclusively) in terms of informed choice or efficiency but in terms of values like protecting the vulnerable, preventing harassment, preserving privacy, and correcting for unjust inequalities. Focusing doctrinally on uses of the unfair-practices authority shared by several agencies, this Article situates the shift both historically and theoretically. Historically, it argues that consumer sovereignty lost ground after the global financial crisis of 2007 and controversies over Big Tech. Theoretically, it argues that the consumer sovereignty framework relied on a too simple model of markets as deviations from “perfect competition” that needed only better information to get back in line and that the paradigm emerging in its place is properly committed to correcting for power asymmetries in irredeemably imperfect markets. I call the new paradigm an “antidomination framework” and defend it.
    • Antitrust Abandonment

      Douglas, Erika M. (Yale Journal on Regulation, 2025)
      This Article identifies the problem of “antitrust abandonment”: a pattern of long-term, unexplained disuse of antitrust-like enforcement powers held by industry regulators. Much of antitrust scholarship focuses on the primary federal enforcers, the Federal Trade Commission (FTC) and the Department of Justice (DOJ). This Article looks instead at several other federal agencies that hold statutory antitrust powers in specific industries, some exclusively. It finds a striking pattern in which these regulators rarely use their antitrust enforcement authority. The Article critically evaluates the track record of antitrust-like enforcement by three industry regulators—in ocean shipping, rail, and meatpacking— using primary research, historical accounts of agency (in)action over time, and the perceptions of scholars, policymakers, and the agencies themselves of their competition oversight. The Article finds an alarming result: these agencies have brought only a handful of antitrust claims, sometimes none at all, over the span of decades, and, in one case, over a century. The Article argues that this antitrust abandonment is a problem, because it leaves unintended gaps in competition enforcement across pockets of highly concentrated, economically important industries. The Article then considers how to cure and prevent antitrust abandonment. It calls for an immediate shift in policymaker expectations, away from the recent push for regulators to use their long-dormant antitrust powers, and toward the empowerment of expert antitrust enforcers—the FTC and the DOJ—to act in abandoned spaces. Achieving this change will require Congress to repeal arcane legislative exceptions, as well as more subtle shifts in agency perceptions of the need for antitrust enforcement in regulated industries.
    • Contractual Landmines

      Scott, Robert E.; Choi, Stephen J.; Gulati, Mitu (Yale Journal on Regulation, 2024)
      Conventional wisdom is that the standardized boilerplate terms used in large commercial markets survive unchanged because they are an optimal solution to the contracting problems facing parties in these markets. As Smith and Warner explained, “harmful heuristics, like harmful mutations, will die out.” But an examination of a sample of current sovereign bond contracts reveals numerous instances of harmful landmines—some are deliberate changes to standard language that increase a creditor’s nonpayment risk, others are blatant drafting errors, and yet others are inapt terms that have been carelessly imported from corporate transactions. Moreover, these landmines differ from each other in important respects: deliberate changes to the standard form reflect strategic lawyering on behalf of sovereign clients, while errors that only benefit subsequent activists reflect haste in adapting precedents to new transactions. Using both quantitative data and interviews with market participants, we find that the conventional view fails to recognize the unique and distorting role that lawyers play in the drafting of standard form contracts. Systematic asymmetries in the market for the lawyers who negotiate and draft these contracts explain why real-world contracts depart from the efficient contract paradigm.
    • Discretionary Investing by ‘Passive’ S&P 500 Funds

      Molk, Peter; Robertson, Adriana Z. (Yale Journal on Regulation, 2024)
      So-called passive index funds—investment funds that are designed to track a pre-specified underlying index—have become a dominant force in the investing landscape, collectively controlling over $12 trillion in assets. It is widely assumed that these funds are obligated to follow their underlying index, and that fund managers cannot, or do not, select portfolios that deviate from the index’s holdings. As a result, various critics have attacked these funds, raising concerns about their corporate governance incentives and their influence on market efficiency. We show this assumption is overly simplistic. To do so, we examine funds that track the most prominent index, the S&P 500. S&P 500 index funds do not typically commit to holding even a representative sample of the underlying index, nor do they commit to replicating the returns of that index. Managers have the legal flexibility to depart substantially from the underlying index’s holdings. We also show that these departures are commonplace: S&P 500 index funds routinely depart from the underlying index by meaningful amounts. While these departures are largest among smaller funds, they are also present among megafunds: even among the largest S&P 500 funds, holdings differed from the index by a total of between 1.7% and 7.5% in the fourth quarter of 2022. Across all S&P 500 funds, these deviations amounted to almost $61.5 billion in discretionary investment decisions. Moreover, at least within observed ranges, we find no meaningful relationship between these deviations and investment flows. In sum, S&P 500 index funds have substantial investment discretion, which they exercise to an extent not previously recognized. Our findings complicate the narrative around index funds and weaken many of the criticisms levied against them. At the same time, to the extent that investors—and particularly retail investors—fail to recognize this discretion, our findings suggest they may not be getting what they expect.
    • Credit Markets and the Visible Hand: The Discount Window and the Macroeconomy

      Conti-Brown, Peter; Skeel, David (Yale Journal on Regulation, 2024)
      In times of crisis such as the 2008 financial crisis and the 2020 COVID-19 pandemic central banks throughout the world engage in interventions with lasting effects on financial markets and the macroeconomy, for better and worse. The negative political consequences of these interventions—fears of politicizing central banking and inflationary concerns about dramatic interventions among them—can dampen the enthusiasm for such interventions early in the face of crisis. This dynamic creates a dilemma for the US central bank, the Federal Reserve, causing it to eschew interventions beyond monetary policy until the crisis has already crashed, at which point the Fed moves into every aspect of policy throughout the economy. This Article highlights the inadequacy of this dynamic. Sole reliance on monetary policy is insufficient in the face of growing crisis, while the Fed's vast emergency lending facilities face ever stiffer political, inflationary, and equity concerns. The Article advocates instead for a new approach to macroeconomic stability, not just through monetary policy or emergency interventions, but through judicious use of the sleeping giant of Fed policy, the bank-intermediated discount window. Focusing on the problematic credit market for debtors-in-possession in the midst of bankruptcy, the Article suggests a reformed system that safeguards the Fed, supports small and medium-sized enterprises, and stabilizes the macroeconomy without exposing the system to the pockets of instability that the Fed’s overreliance on dramatic intervention can do.
    • Mass Shootings and Mass Torts: New Directions in Gun Manufacturer Liability

      Hallas, Laura (Yale Journal on Regulation, 2024)
      Mass shootings are a particularly gutting form of American gun violence. The statistics are staggering to the point of numbing, with the issue’s intensity and timeliness enforced day after day, round after round. Gun manufacturers occupy a vital role in the chain of events ending with mass shooting headlines, yet they face little liability for their involvement because of a 2005 protective federal statute. This Note argues that there may be opportunity for change. Specifically, this Note offers evidence that once strong statutory protections may be weakening and presents strategies for creating previously unimaginable mass tort claims against gun manufacturers.
    • Grid Reliability in the Electric Era

      Macey, Joshua C.; Welton, Shelley; Wiseman, Hannah (Yale Journal on Regulation, 2024)
      The United States has delegated the responsibility of keeping the lights on to a self-regulatory organization called the North American Electric Reliability Corporation (NERC). Although NERC is a crucial example of industry-led governance—and regulates in an area that is central to our economy and basic human survival—this unusual institution has received scant attention from policymakers and scholars. Such attention is overdue. To decarbonize its economy, the United States must enter a new “electric era,” transitioning many sectors to run on electricity while also transforming the electricity system itself to run largely on clean but intermittent renewable resources. These new resources demand new approaches to electric grid reliability—approaches that NERC is failing to adequately embrace. This Article traces NERC’s history, situates NERC in ongoing debates about climate change and grid reliability, and assesses the viability of reliability self-regulation in the electric era. A self-regulatory model for maintaining U.S. electric-grid reliability sufficed in prior decades, when regulated monopolies managed nearly every segment of electricity production. But the criteria that NERC once used to justify self-regulation— ’ expertise, clear accountability metrics, and public-private alignment of interests—no longer hold. The climate crisis creates a need for expertise beyond NERC’s domain, while the introduction of competition in the electricity sector blurs lines of accountability for reliability failures. NERC’s structure also perpetuates an incumbency bias at odds with public goals for the energy transition. These shifting conditions have caused to fail to keep pace with the reliability challenges of the electric era. Worse still, outdated NERC standards help entrench fossil-fuel interests by justifying electricity-market rules poorly suited to accommodate renewable resources. We therefore suggest a suite of reforms that would increase direct government oversight and accountability in electricity-reliability regulation.
    • The Nondelegation Doctrine and the Structure of the Executive

      Froomkin, David B. (Yale Journal on Regulation, 2024)
      In a series of recent opinions, the Supreme Court has threatened to transform the nondelegation doctrine into a device for imposing sweeping limits on congressional authority to empower the regulatory state. But, as a matter of history and logic, the nondelegation doctrine has a quite different purpose. This Article argues that the nondelegation doctrine plays an underappreciated role in constitutional structure: encouraging the segmentation of executive power. The nondelegation doctrine vindicates the Article I Vesting Clause by preventing Congress from being divested of its legislative power. Its purpose is to reinforce Congress’s legislative supremacy in the realm of ordinary law, not to impede Congress’s ability to achieve legislative objectives by delegating regulatory authority to administrative agencies. The nondelegation doctrine accomplishes its distinctly structural purpose by constraining the delegation of broad powers to the President directly, a constraint that encourages legislative delegation of regulatory authority to administrative agencies. The Article explains as a matter of theory why broad delegations to the President, unlike the delegation of substantial regulatory authority to administrative agencies, jeopardize legislative supremacy and hence pose heightened nondelegation concerns, and it finds strong support for this distinction in the history of nondelegation decisions. It concludes that the diffuse departmental structure of the modern administrative state is a testament to the great success of the nondelegation doctrine, not evidence of its underenforcement. Indeed, the contemporary push to reinvent the nondelegation doctrine in an indiscriminate way would turn it into something closer to its opposite, a cudgel against legislative supremacy rather than its guardian. †
    • The Financial Inclusion Trilemma

      Levitin, Adam J. (Yale Journal on Regulation, 2024)
      The challenge of financial inclusion is among the most intractable policy problems in banking. Despite living in the world’s wealthiest economy, many Americans are shut out of the financial system. Five percent of American households lack a bank account, and an additional thirteen percent rely on expensive and sometimes predatory fringe financial services, such as check cashers or payday lenders. Financial inclusion presents a policy trilemma. It is possible to simultaneously achieve only two of three goals: widespread availability of services to low-income consumers, fair terms of service, and profitability of service. Thus it is possible to provide fair and profitable services, but only to a small, cherry-picked population of low-income consumers. Conversely, it is possible to provide profitable service to a large population, but only on exploitative terms. Or it is possible to provide fair services to a large population, but not at a profit. The financial inclusion trilemma is not a market failure. Instead, it is the result of the market working. The market result, however, does not accord with policy preferences. Rather than addressing that tension, American financial inclusion policy still leads with market-based solutions, soft government nudges, and the hope that technology will transform the economics of small-balance deposit accounts and small-dollar loans. It is time to recognize the policy failure in financial inclusion and consider to a menu of stronger regulatory interventions: hard service mandates, taxpayer subsidies, and public provision of financial services. In particular, this Article argues for following the approach taken in Canada, the European Union, and the United Kingdom. This approach—the adoption of a mandate for the provision of free or low-cost basic banking services to all qualified applicants—is the simplest solution to the problem of the unbanked. Addressing small-dollar credit, however, remains an intractable problem, largely beyond the scope of financial regulation because the challenge many low-income consumers face is solvency, not liquidity.
    • More Competitive Search Through Regulation

      Heidhues, Paul; Bonatti, Alessandro; Celis, L. Elisa; Crawford, Gregory S.; Dinielli, David; Luca, Michael; Salz, Tobias; Schnitzer, Monika; Scott Morton, Fiona; Sinkinson, Michael; et al. (Yale Journal on Regulation, 2023)
      This Article identifies a set of possible regulations that could be used both to make the search market more competitive and simultaneously ameliorate the harms flowing from Google’s current monopoly position. The purpose of this Article is to identify conceptual problems and solutions based on sound economic principles and to begin a discussion from which robust and specific policy recommendations can be drafted.
    • Market Design for Personal Data

      Bergemann, Dirk; Crémer, Jacques; Dinielli, David; Groh, Carl-Christian; Heidhues, Paul; Schäfer, Maximilian; Schnitzer, Monika; Scott Morton, Fiona; Seim, Katja; Sullivan, Michael (Yale Journal on Regulation, 2023)
      It is now generally understood that personal data––that is, data that relate to individual consumers––drive digital markets. Personal data underlie targeted advertising, which draws billions of dollars into ad-supported markets. Personal data are useful for other purposes as well. Firms in digital markets rely on personal data to deliver their core products and services––we refer to these collectively as “web services”1––to hone and improve them, and to recommend related products and services. These data facilitate innovation, allowing yet more services and “smart” products with increasingly personalized functionalities. Personal data can allow governments to deliver better public services, such as transportation systems, or can help researchers better understand how humans interact with algorithms and which policies might best serve society. And data can also facilitate competition, by improving quality and providing insight into consumer conduct that encourages entry. In these various ways, the massive quantity of personal data currently collected undoubtedly contributes to consumer welfare. But there also are downsides to the collection and use of personal data on such a grand scale. “Surveillance capitalism,” as Professor Shoshana Zuboff has termed it, has blurred the line between the personal and the public, and has commodified our habits, interests, and beliefs in ways that can feel distasteful and invasive. Massive data collection also has made information about us more accessible to government and commercial actors who often face little to no accountability for its misuse.
    • Fairness and Contestability in the Digital Markets Act

      Crémer, Jacques; Crawford, Gregory S.; Dinielli, David; Fletcher, Amelia; Heidhues, Paul; Schnitzer, Monika; Scott Morton, Fiona (Yale Journal on Regulation, 2023)
      According to the managerial strategy literature, a, if not the, key to large profits is the creation of “moats” that protect firms from competition. Firms with market power create moats to maintain that power, and there exist strong incentives to develop new technologies that allow for broader and deeper moats. On the other hand, from a broader societal perspective, and particularly from the perspective of consumers, these moats often are harmful: they surround customers and deny them the opportunity to purchase from competitors. As a result, consumers suffer from the high prices and/or low quality imposed by the incumbent firm, whose incentives to provide the amount and type of innovation desired by consumers are decreased.
    • Equitable Interoperability: The “Supertool” of Digital Platform Governance

      Scott Morton, Fiona M.; Crawford, Gregory S.; Crémer, Jacques; Dinielli, David; Fletcher, Amelia; Heidhues, Paul; Schnitzer, Monika (Yale Journal on Regulation, 2023)
      This Article is concerned with competition in digital platform markets where network effects are strong. As is widely acknowledged, these markets have an inherent tendency towards concentration, leaving consumers with little competition in the market. We explain how interoperability regulation can help stimulate competition in the market in a way that benefits consumers. There are different types of regulations that involve different levels of regulatory control of firms’ strategies and products. Interoperability is a form of regulation that is less intrusive than many others and is particularly suited to digital business models and fast changing digital technology. The report solicited by the European Commission on “Competition Policy for the Digital Era” (the Vestager Report) made this point in 2019,1 and we build on it here. Policy tools in this area include data portability and open standards, as well as interoperability. We will distinguish among these tools below, but we note here that the focus of this Article is on interoperability.