For over a century, judicial enforcement of antitrust jurisprudence under the Sherman and Clayton Acts has been governed by the Consumer Welfare Standard (CWS), formalized by Robert Bork and the Chicago School in the late 1970s. Under this prevailing standard, anticompetitive conduct is defined almost exclusively by demonstrable consumer harm, typically evidenced by output restriction, quality degradation, or supra-competitive price inflation in a relevant market. If a corporate merger or commercial practice generates measurable productive efficiencies without elevating nominal consumer prices, courts have traditionally presumed the behavior to be pro-competitive or competitively benign.
The meteoric rise of digital multi-sided platform conglomerates—operating in search, social networking, e-commerce, and operating systems—has exposed deep structural inadequacies in this traditional antitrust paradigm. Modern tech platforms differ fundamentally from traditional single-market manufacturing corporations because they operate as zero-price or subsidized two-sided markets. By providing consumer-facing services (such as search queries, navigation maps, or social communication) free of nominal monetary charge, platforms attract immense user bases. These user networks generate massive troves of behavioral data and user attention, which the platform monetizes on the opposite side of its ecosystem through hyper-targeted digital advertising or third-party seller commissions.
Under the orthodox Consumer Welfare Standard, these platform practices appear invulnerable to antitrust prosecution: because consumers pay zero dollars for search or messaging services, plaintiffs struggle to prove immediate economic injury via price gouging. Yet critics, spearheaded by the "New Brandeis" movement, argue that this metric is dangerously myopic. Monopolistic digital platforms leverage cross-side network effects, predatory interoperability restrictions, and deep data moats to preemptively acquire nascent competitors (a tactic known as "killer acquisitions") long before they can develop into viable threats. Furthermore, platforms exploit informational asymmetries by self-preferencing their proprietary products in algorithmic search rankings over those of third-party merchants who rely on the platform's infrastructure. By framing anticompetitive harm solely in terms of short-run retail consumer prices, conventional antitrust jurisprudence ignores systemic long-term threats to innovation, algorithmic neutrality, and market contestability.