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[TOTM: The following is part of a digital symposium by TOTM guests and authors on Antitrust’s Uncertain Future: Visions of Competition in the New Regulatory Landscape. Information on the authors and the entire series of posts is available here.]

Much ink has been spilled regarding the potential harm to the economy and to the rule of law that could stem from enactment of the primary federal antitrust legislative proposal, the American Innovation and Choice Online Act (AICOA) (see here). AICOA proponents, of course, would beg to differ, emphasizing the purported procompetitive benefits of limiting the business freedom of “Big Tech monopolists.”

There is, however, one inescapable reality—as night follows day, passage of AICOA would usher in an extended period of costly litigation over the meaning of a host of AICOA terms. As we will see, this would generate business uncertainty and dampen innovative conduct that might be covered by new AICOA statutory terms. 

The history of antitrust illustrates the difficulties inherent in clarifying the meaning of novel federal statutory language. It was not until 21 years after passage of the Sherman Antitrust Act that the Supreme Court held that Section 1 of the act’s prohibition on contracts, combinations, and conspiracies “in restraint of trade” only covered unreasonable restraints of trade (see Standard Oil Co. of New Jersey v. United States, 221 U.S. 1 (1911)). Furthermore, courts took decades to clarify that certain types of restraints (for example, hardcore price fixing and horizontal market division) were inherently unreasonable and thus per se illegal, while others would be evaluated on a case-by-case basis under a “rule of reason.”

In addition, even far more specific terms related to exclusive dealing, tying, and price discrimination found within the Clayton Antitrust Act gave rise to uncertainty over the scope of their application. This uncertainty had to be sorted out through judicial case-law tests developed over many decades.

Even today, there is no simple, easily applicable test to determine whether conduct in the abstract constitutes illegal monopolization under Section 2 of the Sherman Act. Rather, whether Section 2 has been violated in any particular instance depends upon the application of economic analysis and certain case-law principles to matter-specific facts.

As is the case with current antitrust law, the precise meaning and scope of AICOA’s terms will have to be fleshed out over many years. Scholarly critiques of AICOA’s language underscore the seriousness of this problem.

In its April 2022 public comment on AICOA, the American Bar Association (ABA)  Antitrust Law Section explains in some detail the significant ambiguities inherent in specific AICOA language that the courts will have to address. These include “ambiguous terminology … regarding fairness, preferencing, materiality, and harm to competition on covered platforms”; and “specific language establishing affirmative defenses [that] creates significant uncertainty”. The ABA comment further stresses that AICOA’s failure to include harm to the competitive process as a prerequisite for a statutory violation departs from a broad-based consensus understanding within the antitrust community and could have the unintended consequence of disincentivizing efficient conduct. This departure would, of course, create additional interpretive difficulties for federal judges, further complicating the task of developing coherent case-law principles for the new statute.

Lending support to the ABA’s concerns, Northwestern University professor of economics Dan Spulber notes that AICOA “may have adverse effects on innovation and competition because of imprecise concepts and terminology.”

In a somewhat similar vein, Stanford Law School Professor (and former acting assistant attorney general for antitrust during the Clinton administration) Douglas Melamed complains that:

[AICOA] does not include the normal antitrust language (e.g., “competition in the market as a whole,” “market power”) that gives meaning to the idea of harm to competition, nor does it say that the imprecise language it does use is to be construed as that language is construed by the antitrust laws. … The bill could be very harmful if it is construed to require, not increased market power, but simply harm to rivals.

In sum, ambiguities inherent in AICOA’s new terminology will generate substantial uncertainty among affected businesses. This uncertainty will play out in the courts over a period of years. Moreover, the likelihood that judicial statutory constructions of AICOA language will support “efficiency-promoting” interpretations of behavior is diminished by the fact that AICOA’s structural scheme (which focuses on harm to rivals) does not harmonize with traditional antitrust concerns about promoting a vibrant competitive process.

Knowing this, the large high-tech firms covered by AICOA will become risk averse and less likely to innovate. (For example, they will be reluctant to improve algorithms in a manner that would increase efficiency and benefit consumers, but that might be seen as disadvantaging rivals.) As such, American innovation will slow, and consumers will suffer. (See here for an estimate of the enormous consumer-welfare gains generated by high tech platforms—gains of a type that AICOA’s enactment may be expected to jeopardize.) It is to be hoped that Congress will take note and consign AICOA to the rubbish heap of disastrous legislative policy proposals.

The Biden administration’s antitrust reign of error continues apace. The U.S. Justice Department’s (DOJ) Antitrust Division has indicated in recent months that criminal prosecutions may be forthcoming under Section 2 of the Sherman Antitrust Act, but refuses to provide any guidance regarding enforcement criteria.

Earlier this month, Deputy Assistant Attorney General Richard Powers stated that “there’s ample case law out there to help inform those who have concerns or questions” regarding Section 2 criminal enforcement, conveniently ignoring the fact that criminal Section 2 cases have not been brought in almost half a century. Needless to say, those ancient Section 2 cases (which are relatively few in number) antedate the modern era of economic reasoning in antitrust analysis. What’s more, unlike Section 1 price-fixing and market-division precedents, they yield no clear rule as to what constitutes criminal unilateral behavior. Thus, DOJ’s suggestion that old cases be consulted for guidance is disingenuous at best. 

It follows that DOJ criminal-monopolization prosecutions would be sheer folly. They would spawn substantial confusion and uncertainty and disincentivize dynamic economic growth.

Aggressive unilateral business conduct is a key driver of the competitive process. It brings about “creative destruction” that transforms markets, generates innovation, and thereby drives economic growth. As such, one wants to be particularly careful before condemning such conduct on grounds that it is anticompetitive. Accordingly, error costs here are particularly high and damaging to economic prosperity.

Moreover, error costs in assessing unilateral conduct are more likely than in assessing joint conduct, because it is very hard to distinguish between procompetitive and anticompetitive single-firm conduct, as DOJ’s 2008 Report on Single Firm Conduct Under Section 2 explains (citations omitted):

Courts and commentators have long recognized the difficulty of determining what means of acquiring and maintaining monopoly power should be prohibited as improper. Although many different kinds of conduct have been found to violate section 2, “[d]efining the contours of this element … has been one of the most vexing questions in antitrust law.” As Judge Easterbrook observes, “Aggressive, competitive conduct by any firm, even one with market power, is beneficial to consumers. Courts should prize and encourage it. Aggressive, exclusionary conduct is deleterious to consumers, and courts should condemn it. The big problem lies in this: competitive and exclusionary conduct look alike.”

The problem is not simply one that demands drawing fine lines separating different categories of conduct; often the same conduct can both generate efficiencies and exclude competitors. Judicial experience and advances in economic thinking have demonstrated the potential procompetitive benefits of a wide variety of practices that were once viewed with suspicion when engaged in by firms with substantial market power. Exclusive dealing, for example, may be used to encourage beneficial investment by the parties while also making it more difficult for competitors to distribute their products.

If DOJ does choose to bring a Section 2 criminal case soon, would it target one of the major digital platforms? Notably, a U.S. House Judiciary Committee letter recently called on DOJ to launch a criminal investigation of Amazon (see here). Also, current Federal Trade Commission (FTC) Chair Lina Khan launched her academic career with an article focusing on Amazon’s “predatory pricing” and attacking the consumer welfare standard (see here).

Khan’s “analysis” has been totally discredited. As a trenchant scholarly article by Timothy Muris and Jonathan Nuechterlein explains:

[DOJ’s criminal Section 2 prosecution of A&P, begun in 1944,] bear[s] an eerie resemblance to attacks today on leading online innovators. Increasingly integrated and efficient retailers—first A&P, then “big box” brick-and-mortar stores, and now online retailers—have challenged traditional retail models by offering consumers lower prices and greater convenience. For decades, critics across the political spectrum have reacted to such disruption by urging Congress, the courts, and the enforcement agencies to stop these American success stories by revising antitrust doctrine to protect small businesses rather than the interests of consumers. Using antitrust law to punish pro-competitive behavior makes no more sense today than it did when the government attacked A&P for cutting consumers too good a deal on groceries. 

Before bringing criminal Section 2 charges against Amazon, or any other “dominant” firm, DOJ leaders should read and absorb the sobering Muris and Nuechterlein assessment. 

Finally, not only would DOJ Section 2 criminal prosecutions represent bad public policy—they would also undermine the rule of law. In a very thoughtful 2017 speech, then-Acting Assistant Attorney General for Antitrust Andrew Finch succinctly summarized the importance of the rule of law in antitrust enforcement:

[H]ow do we administer the antitrust laws more rationally, accurately, expeditiously, and efficiently? … Law enforcement requires stability and continuity both in rules and in their application to specific cases.

Indeed, stability and continuity in enforcement are fundamental to the rule of law. The rule of law is about notice and reliance. When it is impossible to make reasonable predictions about how a law will be applied, or what the legal consequences of conduct will be, these important values are diminished. To call our antitrust regime a “rule of law” regime, we must enforce the law as written and as interpreted by the courts and advance change with careful thought.

The reliance fostered by stability and continuity has obvious economic benefits. Businesses invest, not only in innovation but in facilities, marketing, and personnel, and they do so based on the economic and legal environment they expect to face.

Of course, we want businesses to make those investments—and shape their overall conduct—in accordance with the antitrust laws. But to do so, they need to be able to rely on future application of those laws being largely consistent with their expectations. An antitrust enforcement regime with frequent changes is one that businesses cannot plan for, or one that they will plan for by avoiding certain kinds of investments.

Bringing criminal monopolization cases now, after a half-century of inaction, would be antithetical to the stability and continuity that underlie the rule of law. What’s worse, the failure to provide prosecutorial guidance would be squarely at odds with concerns of notice and reliance that inform the rule of law. As such, a DOJ decision to target firms for Section 2 criminal charges would offend the rule of law (and, sadly, follow the FTC ‘s recent example of flouting the rule of law, see here and here).

In sum, the case against criminal Section 2 prosecutions is overwhelming. At a time when DOJ is facing difficulties winning “slam dunk” criminal Section 1  prosecutions targeting facially anticompetitive joint conduct (see here, here, and here), the notion that it would criminally pursue unilateral conduct that may generate substantial efficiencies is ludicrous. Hopefully, DOJ leadership will come to its senses and drop any and all plans to bring criminal Section 2 cases.

In the U.S. system of dual federal and state sovereigns, a normative analysis reveals principles that could guide state antitrust-enforcement priorities, to promote complementarity in federal and state antitrust policy, and thereby advance consumer welfare.


Positive analysis reveals that state antitrust enforcement is a firmly entrenched feature of American antitrust policy. The U.S. Supreme Court (1) has consistently held that federal antitrust law does not displace state antitrust law (see, for example, California v. ARC America Corp. (U.S., 1989) (“Congress intended the federal antitrust laws to supplement, not displace, state antitrust remedies”)); and (2) has upheld state antitrust laws even when they have some impact on interstate commerce (see, for example, Exxon Corp. v. Governor of Maryland (U.S., 1978)).

The normative question remains, however, as to what the appropriate relationship between federal and state antitrust enforcement should be. Should federal and state antitrust regimes be complementary, with state law enforcement enhancing the effectiveness of federal enforcement? Or should state antitrust enforcement compete with federal enforcement, providing an alternative “vision” of appropriate antitrust standards?

The generally accepted (until very recently) modern American consumer-welfare-centric antitrust paradigm (see here) points to the complementary approach as most appropriate. In other words, if antitrust is indeed the “magna carta” of American free enterprise (see United States v. Topco Associates, Inc., U.S. (U.S. 1972), and if consumer welfare is the paramount goal of antitrust (a position consistently held by the Supreme Court since Reiter v. Sonotone Corp., (U.S., 1979)), it follows that federal and state antitrust enforcement coexist best as complements, directed jointly at maximizing consumer-welfare enhancement. In recent decades it also generally has made sense for state enforcers to defer to U.S. Justice Department (DOJ) and Federal Trade Commission (FTC) matter-specific consumer-welfare assessments. This conclusion follows from the federal agencies’ specialized resource advantage, reflected in large staffs of economic experts and attorneys with substantial industry knowledge.

The reality, nevertheless, is that while state enforcers often have cooperated with their federal colleagues on joint enforcement, state enforcement approaches historically have been imperfectly aligned with federal policy. That imperfect alignment has been at odds with consumer welfare in key instances. Certain state antitrust schemes, for example, continue to treat resale price maintenance (RPM)  as per se illegal (see, for example, here), a position inconsistent with the federal consumer welfare-centric rule of reason approach (see Leegin Creative Leather Products, Inc. v. PSKS, Inc. (U.S., 2007)). The disparate treatment of RPM has a substantial national impact on business conduct, because commercially important states such as California and New York are among those that continue to flatly condemn RPM.

State enforcers also have from time to time sought to oppose major transactions that received federal antitrust clearance, such as several states’ unsuccessful opposition to the merger of Sprint and T-Mobile merger (see here). Although the states failed to block the merger, they did extract settlement concessions that imposed burdens on the merging parties, in addition to the divestiture requirements impose by the DOJ in settling the matter (see here). Inconsistencies between federal and state antitrust-enforcement decisions on cases of nationwide significance generate litigation waste and may detract from final resolutions that optimize consumer welfare.

If consumer-welfare optimization is their goal (which I believe it should be in an ideal world), state attorneys general should seek to direct their limited antitrust resources to their highest valued uses, rather than seeking to second guess federal antitrust policy and enforcement decisions.

An optimal approach might focus first and foremost on allocating state resources to combat primarily intrastate competitive harms that are clear and unequivocal (such as intrastate bid rigging, hard core price fixing, and horizontal market division). This could free up federal resources to focus on matters that are primarily interstate in nature, consistent with federalism. (In this regard, see a thoughtful proposal by D. Bruce Johnsen and Moin A. Yaha.)

Second, state enforcers could also devote some resources to assist federal enforcers in developing state-specific evidence in support of major national cases. (This would allow state attorneys general to publicize their “big case” involvement in a productive manner.)

Third, but not least, competition advocacy directed at the removal of anticompetitive state laws and regulations could prove an effective means of seeking to improve the competitive climate within individual states (see, for example, here). State antitrust enforcers could advance advocacy through amicus curiae briefs, and (where politically feasible) through interventions (perhaps informal) with peer officials who oversee regulation. Subject to this general guidance, the nature of state antitrust resource allocations would depend upon the specific competitive problems particular to each state.

Of course, in the real world, public choice considerations and rent seeking may at times influence antitrust enforcement decision-making by state (and federal) officials. Nonetheless, the capsule idealized normative summary of a suggested ideal state antitrust-enforcement protocol is useful in that it highlights how state enforcers could usefully complement (assumed) sound federal antitrust initiatives.

Great minds think alike. A well-crafted and much more detailed normative exploration of ideal state antitrust enforcement is found in a recently released Pelican Institute policy brief by Ted Bolema and Eric Peterson. Entitled The Proper Role for States in Antitrust Lawsuits, the brief concludes (in a manner consistent with my observations):

This review of cases and leading commentaries shows that states should focus their involvement in antitrust cases on instances where:

· they have unique interests, such as local price-fixing

· play a unique role, such as where they can develop evidence about how alleged anticompetitive behavior uniquely affects local markets

· they can bring additional resources to bear on existing federal litigation.

States can also provide a useful check on overly aggressive federal enforcement by providing courts with a traditional perspective on antitrust law — a role that could become even more important as federal agencies aggressively seek to expand their powers. All of these are important roles for states to play in antitrust enforcement, and translate into positive outcomes that directly benefit consumers.

Conversely, when states bring significant, novel antitrust lawsuits on their own, they don’t tend to benefit either consumers or constituents. These novel cases often move resources away from where they might be used more effectively, and states usually lose (as with the recent dismissal with prejudice of a state case against Facebook). Through more strategic antitrust engagement, with a focus on what states can do well and where they can make a positive difference antitrust enforcement, states would best serve the interests of their consumers, constituents, and taxpayers.


Under a consumer-welfare-centric regime, an appropriate role can be identified for state antitrust enforcement that would helpfully complement federal efforts in an optimal fashion. Unfortunately, in this tumultuous period of federal antitrust policy shifts, in which the central role of the consumer welfare standard has been called into question, it might appear fatuous to speculate on the ideal melding of federal and state approaches to antitrust administration. One should, however, prepare for the time when a more enlightened, economically informed approach will be reinstituted. In anticipation of that day, serious thinking about antitrust federalism should not be neglected.