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A lawsuit filed by the State of Texas and nine other states in December 2020 alleges, among other things, that Google has engaged in anticompetitive conduct related to its online display-advertising business.

Broadly, the Texas complaint (previously discussed in this TOTM symposium) alleges that Google possesses market power in ad-buying tools and in search, illustrated in the figure below.

The complaint also alleges anticompetitive conduct by Google with respect to YouTube in a separate “inline video-advertising market.” According to the complaint, this market power is leveraged to force transactions through Google’s exchange, AdX, and its network, Google Display Network. The leverage is further exercised by forcing publishers to license Google’s ad server, Google Ad Manager.

Although the Texas complaint raises many specific allegations, the key ones constitute four broad claims: 

  1. Google forces publishers to license Google’s ad server and trade in Google’s ad exchange;
  2. Google uses its control over publishers’ inventory to block exchange competition;
  3. Google has disadvantaged technology known as “header bidding” in order to prevent publishers from accessing its competitors; and
  4. Google prevents rival ad-placement services from competing by not allowing them to buy YouTube ad space.

Alleged harms

The Texas complaint alleges Google’s conduct has caused harm to competing networks, exchanges, and ad servers. The complaint also claims that the plaintiff states’ economies have been harmed “by depriving the Plaintiff States and the persons within each Plaintiff State of the benefits of competition.”

In a nod to the widely accepted Consumer Welfare Standard, the Texas complaint alleges harm to three categories of consumers:

  1. Advertisers who pay for their ads to be displayed, but should be paying less;
  2. Publishers who are paid to provide space on their sites to display ads, but should be paid more; and
  3. Users who visit the sites, view the ads, and purchase or use the advertisers’ and publishers’ products and services.

The complaint claims users are harmed by above-competitive prices paid by advertisers, in that these higher costs are passed on in the form of higher prices and lower quality for the products and services they purchase from those advertisers. The complaint simultaneously claims that users are harmed by the below-market prices received by publishers in the form of “less content (lower output of content), lower-quality content, less innovation in content delivery, more paywalls, and higher subscription fees.”

Without saying so explicitly, the complaint insinuates that if intermediaries (e.g., Google and competing services) charged lower fees for their services, advertisers would pay less, publishers would be paid more, and consumers would be better off in the form of lower prices and better products from advertisers, as well as improved content and lower fees on publishers’ sites.

Effective competition is not an antitrust offense

A flawed premise underlies much of the Texas complaint. It asserts that conduct by a dominant incumbent firm that makes competition more difficult for competitors is inherently anticompetitive, even if that conduct confers benefits on users.

This amounts to a claim that Google is acting anti-competitively by innovating and developing products and services to benefit one or more display-advertising constituents (e.g., advertisers, publishers, or consumers) or by doing things that benefit the advertising ecosystem more generally. These include creating new and innovative products, lowering prices, reducing costs through vertical integration, or enhancing interoperability.

The argument, which is made explicitly elsewhere, is that Google must show that it has engineered and implemented its products to minimize obstacles its rivals face, and that any efficiencies created by its products must be shown to outweigh the costs imposed by those improvements on the company’s competitors.

Similarly, claims that Google has acted in an anticompetitive fashion rest on the unsupportable notion that the company acts unfairly when it designs products to benefit itself without considering how those designs would affect competitors. Google could, it is argued, choose alternate arrangements and practices that would possibly confer greater revenue on publishers or lower prices on advertisers without imposing burdens on competitors.

For example, a report published by the Omidyar Network sketching a “roadmap” for a case against Google claims that, if Google’s practices could possibly be reimagined to achieve the same benefits in ways that foster competition from rivals, then the practices should be condemned as anticompetitive:

It is clear even to us as lay people that there are less anticompetitive ways of delivering effective digital advertising—and thereby preserving the substantial benefits from this technology—than those employed by Google.

– Fiona M. Scott Morton & David C. Dinielli, “Roadmap for a Digital Advertising Monopolization Case Against Google”

But that’s not how the law—or the economics—works. This approach converts beneficial aspects of Google’s ad-tech business into anticompetitive defects, essentially arguing that successful competition and innovation create barriers to entry that merit correction through antitrust enforcement.

This approach turns U.S. antitrust law (and basic economics) on its head. As some of the most well-known words of U.S. antitrust jurisprudence have it:

A single producer may be the survivor out of a group of active competitors, merely by virtue of his superior skill, foresight and industry. In such cases a strong argument can be made that, although, the result may expose the public to the evils of monopoly, the Act does not mean to condemn the resultant of those very forces which it is its prime object to foster: finis opus coronat. The successful competitor, having been urged to compete, must not be turned upon when he wins.

– United States v. Aluminum Co. of America, 148 F.2d 416 (2d Cir. 1945)

U.S. antitrust law is intended to foster innovation that creates benefits for consumers, including innovation by incumbents. The law does not proscribe efficiency-enhancing unilateral conduct on the grounds that it might also inconvenience competitors, or that there is some other arrangement that could be “even more” competitive. Under U.S. antitrust law, firms are “under no duty to help [competitors] survive or expand.”  

To be sure, the allegations against Google are couched in terms of anticompetitive effect, rather than being described merely as commercial disagreements over the distribution of profits. But these effects are simply inferred, based on assumptions that Google’s vertically integrated business model entails an inherent ability and incentive to harm rivals.

The Texas complaint claims Google can surreptitiously derive benefits from display advertisers by leveraging its search-advertising capabilities, or by “withholding YouTube inventory,” rather than altruistically opening Google Search and YouTube up to rival ad networks. The complaint alleges Google uses its access to advertiser, publisher, and user data to improve its products without sharing this data with competitors.

All these charges may be true, but they do not describe inherently anticompetitive conduct. Under U.S. law, companies are not obliged to deal with rivals and certainly are not obliged to do so on those rivals’ preferred terms

As long ago as 1919, the U.S. Supreme Court held that:

In the absence of any purpose to create or maintain a monopoly, the [Sherman Act] does not restrict the long recognized right of [a] trader or manufacturer engaged in an entirely private business, freely to exercise his own independent discretion as to parties with whom he will deal.

– United States v. Colgate & Co.

U.S. antitrust law does not condemn conduct on the basis that an enforcer (or a court) is able to identify or hypothesize alternative conduct that might plausibly provide similar benefits at lower cost. In alleging that there are ostensibly “better” ways that Google could have pursued its product design, pricing, and terms of dealing, both the Texas complaint and Omidyar “roadmap” assert that, had the firm only selected a different path, an alternative could have produced even more benefits or an even more competitive structure.

The purported cure of tinkering with benefit-producing unilateral conduct by applying an “even more competition” benchmark is worse than the supposed disease. The adjudicator is likely to misapply such a benchmark, deterring the very conduct the law seeks to promote.

For example, Texas complaint alleges: “Google’s ad server passed inside information to Google’s exchange and permitted Google’s exchange to purchase valuable impressions at artificially depressed prices.” The Omidyar Network’s “roadmap” claims that “after purchasing DoubleClick, which became its publisher ad server, Google apparently lowered its prices to publishers by a factor of ten, at least according to one publisher’s account related to the CMA. Low prices for this service can force rivals to depart, thereby directly reducing competition.”

In contrast, as current U.S. Supreme Court Associate Justice Stephen Breyer once explained, in the context of above-cost low pricing, “the consequence of a mistake here is not simply to force a firm to forego legitimate business activity it wishes to pursue; rather, it is to penalize a procompetitive price cut, perhaps the most desirable activity (from an antitrust perspective) that can take place in a concentrated industry where prices typically exceed costs.”  That commentators or enforcers may be able to imagine alternative or theoretically more desirable conduct is beside the point.

It has been reported that the U.S. Justice Department (DOJ) may join the Texas suit or bring its own similar action against Google in the coming months. If it does, it should learn from the many misconceptions and errors in the Texas complaint that leave it on dubious legal and economic grounds.

Digital advertising is the economic backbone of the Internet. It allows websites and apps to monetize their userbase without having to charge them fees, while the emergence of targeted ads allows this to be accomplished affordably and with less wasted time wasted.

This advertising is facilitated by intermediaries using the “adtech stack,” through which advertisers and publishers are matched via auctions and ads ultimately are served to relevant users. This intermediation process has advanced enormously over the past three decades. Some now allege, however, that this market is being monopolized by its largest participant: Google.

A lawsuit filed by the State of Texas and nine other states in December 2020 alleges, among other things, that Google has engaged in anticompetitive conduct related to its online display advertising business. Those 10 original state plaintiffs were joined by another four states and the Commonwealth of Puerto Rico in March 2021, while South Carolina and Louisiana have also moved to be added as additional plaintiffs. Google also faces a pending antitrust lawsuit brought by the U.S. Justice Department (DOJ) and 14 states (originally 11) related to the company’s distribution agreements, as well as a separate action by the State of Utah, 35 other states, and the District of Columbia related to its search design.

In recent weeks, it has been reported that the DOJ may join the Texas suit or bring its own similar action against Google in the coming months. If it does, it should learn from the many misconceptions and errors in the Texas complaint that leave it on dubious legal and economic grounds.

​​Relevant market

The Texas complaint identifies at least five relevant markets within the adtech stack that it alleges Google either is currently monopolizing or is attempting to monopolize:

  1. Publisher ad servers;
  2. Display ad exchanges;
  3. Display ad networks;
  4. Ad-buying tools for large advertisers; and
  5. Ad-buying tools for small advertisers.

None of these constitute an economically relevant product market for antitrust purposes, since each “market” is defined according to how superficially similar the products are in function, not how substitutable they are. Nevertheless, the Texas complaint vaguely echoes how markets were conceived in the “Roadmap” for a case against Google’s advertising business, published last year by the Omidyar Network, which may ultimately influence any future DOJ complaint, as well.

The Omidyar Roadmap narrows the market from media advertising to digital advertising, then to the open supply of display ads, which comprises only 9% of the total advertising spending and less than 20% of digital advertising, as shown in the figure below. It then further narrows the defined market to the intermediation of the open supply of display ads. Once the market has been sufficiently narrowed, the Roadmap authors conclude that Google’s market share is “perhaps sufficient to confer market power.”

While whittling down the defined market may achieve the purposes of sketching a roadmap to prosecute Google, it also generates a mishmash of more than a dozen relevant markets for digital display and video advertising. In many of these, Google doesn’t have anything approaching market power, while, in some, Facebook is the most dominant player.

The Texas complaint adopts a non-economic approach to market definition.  It ignores potential substitutability between different kinds of advertising, both online and offline, which can serve as a competitive constraint on the display advertising market. The complaint considers neither alternative forms of display advertising, such as social media ads, nor alternative forms of advertising, such as search ads or non-digital ads—all of which can and do act as substitutes. It is possible, at the very least, that advertisers who choose to place ads on third-party websites may switch to other forms of advertising if the price of third-party website advertising was above competitive levels. To ignore this possibility, as the Texas complaint does, is to ignore the entire purpose of defining the relevant antitrust market altogether.

Offline advertising vs. online advertising

The fact that offline and online advertising employ distinct processes does not consign them to economically distinct markets. Indeed, online advertising has manifestly drawn advertisers from offline markets, just as previous technological innovations drew advertisers from other pre-existing channels.

Moreover, there is evidence that, in some cases, offline and online advertising are substitute products. For example, economists Avi Goldfarb and Catherine Tucker demonstrate that display advertising pricing is sensitive to the availability of offline alternatives. They conclude:

We believe our studies refute the hypothesis that online and offline advertising markets operate independently and suggest a default position of substitution. Online and offline advertising markets appear to be closely related. That said, it is important not to draw any firm conclusions based on historical behavior.

Display ads vs. search ads

There is perhaps even more reason to doubt that online display advertising constitutes a distinct, economically relevant market from online search advertising.

Although casual and ill-informed claims are often made to the contrary, various forms of targeted online advertising are significant competitors of each other. Bo Xing and Zhanxi Lin report firms spread their marketing budgets across these different sources of online marketing, and “search engine optimizers”—firms that help websites to maximize the likelihood of a valuable “top-of-list” organic search placement—attract significant revenue. That is, all of these different channels vie against each other for consumer attention and offer advertisers the ability to target their advertising based on data gleaned from consumers’ interactions with their platforms.

Facebook built a business on par with Google’s thanks in large part to advertising, by taking advantage of users’ more extended engagement with the platform to assess relevance and by enabling richer, more engaged advertising than previously appeared on Google Search. It’s an entirely different model from search, but one that has turned Facebook into a competitive ad platform.

And the market continues to shift. Somewhere between 37-56% of product searches start on Amazon, according to one survey, and advertisers have noticed. This is not surprising, given Amazon’s strong ability to match consumers with advertisements, and to do so when and where consumers are more likely to make a purchase.

‘Open’ display advertising vs. ‘owned-and-operated’ display advertising

The United Kingdom’s Competition and Markets Authority (like the Omidyar Roadmap report) has identified two distinct channels of display advertising, which they term “owned and operated” and “open.” The CMA concludes:

Over half of display expenditure is generated by Facebook, which owns both the Facebook platform and Instagram. YouTube has the second highest share of display advertising and is owned by Google. The open display market, in which advertisers buy inventory from many publishers of smaller scale (for example, newspapers and app providers) comprises around 32% of display expenditure.

The Texas complaint does not directly address the distinction between open and owned and operated, but it does allege anticompetitive conduct by Google with respect to YouTube in a separate “inline video advertising market.” 

The CMA finds that the owned-and-operated channel mostly comprises large social media platforms, which sell their own advertising inventory directly to advertisers or media agencies through self-service interfaces, such as Facebook Ads Manager or Snapchat Ads Manager.  In contrast, in the open display channel, publishers such as online newspapers and blogs sell their inventory to advertisers through a “complex chain of intermediaries.”  Through these, intermediaries run auctions that match advertisers’ ads to publisher inventory of ad space. In both channels, nearly all transactions are run through programmatic technology.

The CMA concludes that advertisers “largely see” the open and the owned-and-operated channels as substitutes. According to the CMA, an advertiser’s choice of one channel over the other is driven by each channel’s ability to meet the key performance metrics the advertising campaign is intended to achieve.

The Omidyar Roadmap argues, instead, that the CMA too narrowly focuses on the perspective of advertisers. The Roadmap authors claim that “most publishers” do not control supply that is “owned and operated.” As a result, they conclude that publishers “such as gardenandgun.com or hotels.com” do not have any owned-and-operated supply and can generate revenues from their supply “only through the Google-dominated adtech stack.” 

But this is simply not true. For example, in addition to inventory in its print media, Garden & Gun’s “Digital Media Kit” indicates that the publisher has several sources of owned-and-operated banner and video supply, including the desktop, mobile, and tablet ads on its website; a “homepage takeover” of its website; branded/sponsored content; its email newsletters; and its social media accounts. Hotels.com, an operating company of Expedia Group, has its own owned-and-operated search inventory, which it sells through its “Travel Ads Sponsored Listing,” as well owned-and-operated supply of standard and custom display ads.

Given that both perform the same function and employ similar mechanisms for matching inventory with advertisers, it is unsurprising that both advertisers and publishers appear to consider the owned-and-operated channel and the open channel to be substitutes.