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Why do governments regulate, and whose interests do regulations actually serve? For much of the twentieth century, the dominant answer was straightforward: regulation corrects market failures in the public interest. But that answer has been challenged, refined, and partly displaced by a series of analytical frameworks that ask harder questions about the motivations of regulators, the dynamics of interest-group competition, and the cognitive limits of the actors involved. The subfield of public choice and regulation is defined by this ongoing debate over the nature and purpose of regulation, and by the competing models that have emerged to explain it.
From the early 1900s through the 1960s, Public Interest Theory provided the standard justification for government intervention. Its core claim was straightforward: markets sometimes fail—through monopolies, externalities, or information asymmetries—and benevolent regulators step in to correct those failures for the common good. Regulation was seen as a technical, apolitical response to inefficiency. This framework was less a formal theory than a normative assumption embedded in legal doctrine and early economic analysis. It treated regulators as neutral experts who could identify market failures and design optimal remedies. The public interest view dominated legal and policy discourse for decades, but it left a crucial question unanswered: if regulators are truly benevolent, why does regulation so often seem to benefit well-organized industries rather than the general public?
The 1960s brought two distinct but overlapping challenges to the public interest orthodoxy. Both rejected the assumption of benevolent government, but they did so from different angles.
Institutional Law and Economics emerged as a framework that shifted attention from ideal market outcomes to the real-world costs of using legal and political institutions. Drawing on the work of Ronald Coase and others, it argued that transaction costs—the costs of bargaining, enforcing agreements, and gathering information—are central to understanding why regulation takes the forms it does. Rather than assuming that government can costlessly fix market failures, Institutional Law and Economics insisted on comparing the actual performance of alternative institutional arrangements: markets, firms, regulation, and common law. This comparative-institutional approach did not assume regulators were self-interested; it simply recognized that all governance mechanisms have limitations. The framework remains active today, especially in the analysis of property rights, contract enforcement, and the design of regulatory agencies.
At roughly the same time, the Virginia School of public choice offered a more direct assault on the public interest model. Led by James Buchanan and Gordon Tullock, the Virginia School applied the rational-actor assumptions of economics to political decision-making. Politicians, bureaucrats, and voters were modeled as self-interested maximizers, just like market participants. Regulation, in this view, was not a corrective for market failure but a product of political exchange: interest groups demand regulation that benefits them, and politicians supply it in exchange for votes, campaign contributions, or other forms of support. The Virginia School’s distinctive contribution was its focus on constitutional design as a way to constrain the inevitable tendency toward rent-seeking and government expansion. Where Institutional Law and Economics emphasized transaction costs and comparative institutions, the Virginia School emphasized incentives and the need for rules that limit the damage from self-interested political behavior. These two frameworks coexisted from the start, offering complementary rather than contradictory critiques: one focused on the costs of institutional choice, the other on the political logic of regulatory outcomes.
In the 1970s, the Chicago School Economic Theory of Regulation sharpened the public choice critique into a precise positive model. Associated with George Stigler, Sam Peltzman, and Gary Becker, this framework argued that regulation is best understood as a good traded in a political market. Well-organized groups with concentrated interests—such as industries seeking entry barriers or price controls—tend to win at the expense of diffuse consumers or taxpayers. The Chicago theory predicted that regulation would typically benefit producers, not the public, and that regulatory agencies would eventually be “captured” by the industries they were supposed to oversee.
What distinguished the Chicago School from the Virginia School was its emphasis on equilibrium outcomes and its more optimistic view of political competition. While the Virginia School saw rent-seeking as a persistent threat requiring constitutional constraints, the Chicago School argued that interest-group competition would tend toward efficient outcomes in the long run—efficient in the sense that the groups that value regulation most highly will get it. This efficiency claim was controversial and remains a point of sharp disagreement. The Chicago theory also narrowed the focus of regulatory analysis: it treated the content of regulation as endogenous, determined by the relative political power of competing groups, and it downplayed the role of ideas, norms, or institutional history. Despite these limitations, the framework became enormously influential in empirical work on regulation, providing testable hypotheses about which industries get regulated and how.
By the 1990s, a new challenge emerged—not to the self-interest assumption of public choice, but to the rational-actor model that both the Virginia and Chicago schools had inherited from neoclassical economics. Behavioral Law and Economics drew on cognitive psychology and behavioral economics to show that real decision-makers—voters, legislators, regulators, and even interest-group leaders—are subject to systematic biases: overconfidence, loss aversion, framing effects, and limited willpower. These biases undermine the neat predictions of rational-choice public choice.
Behavioral Law and Economics did not replace the earlier frameworks; instead, it complicated them. For example, if voters are systematically biased toward the status quo or overestimate the risks of rare events, then the political market for regulation may produce outcomes that neither the public interest nor the interest-group model would predict. The behavioral framework also revived interest in the possibility that regulation could sometimes improve welfare—not by correcting market failures, but by helping people overcome their own cognitive limitations (so-called “libertarian paternalism” or “nudging”). This created a new tension: behavioral insights could be used to support either more or less regulation, depending on how one diagnosed the relevant biases. The framework remains a live tradition, actively debating the Virginia and Chicago schools over the adequacy of the rational-actor foundation.
Today, no single framework dominates the study of public choice and regulation. Instead, the field is characterized by a productive pluralism. Institutional Law and Economics continues to provide the tools for comparative institutional analysis, especially in the study of regulatory design and governance structures. The Virginia School remains influential in constitutional political economy and in analyses of bureaucratic behavior, lobbying, and rent-seeking. The Chicago School Economic Theory of Regulation still anchors much empirical work on regulatory capture and the political economy of specific industries. Behavioral Law and Economics has carved out a growing niche, particularly in consumer protection, health and safety regulation, and the design of disclosure rules.
What the leading frameworks agree on is that the old public interest theory is inadequate: regulation cannot be understood simply as a benevolent response to market failure. All four active frameworks treat regulation as the product of political and institutional forces that must be analyzed rather than assumed away. Where they disagree is on the fundamental drivers of those forces. The Virginia and Chicago schools continue to rely on rational-actor models, while Behavioral Law and Economics insists on psychological realism. Institutional Law and Economics emphasizes the role of transaction costs and historical path dependence, while the Chicago theory stresses equilibrium and efficiency. These disagreements are not signs of weakness; they are the engine of ongoing research. The subfield’s central question—whose interests does regulation serve?—remains open, and each framework offers a distinct lens for answering it.
In practice, researchers often combine elements from multiple frameworks. A study of environmental regulation might use the Chicago theory to model industry lobbying, Institutional Law and Economics to examine the costs of alternative compliance mechanisms, and Behavioral Law and Economics to analyze how consumers respond to information disclosures. The frameworks are not mutually exclusive; they are tools for different parts of the puzzle. The vitality of public choice and regulation as a subfield lies in this ongoing conversation—a conversation that began with the collapse of the public interest orthodoxy and continues to evolve as new methods and evidence reshape our understanding of how regulation really works.