Micron’s chief executive said that memory supply will be much tighter in 2027 and 2028 than it was in 2026. End users responded with bitterness, noting that executives were telling them prices are terrible and urging them to buy now before they get worse, while at the same time arguing that the free‑market defense fails when industry incumbents actively block new competitors from entering the primary market.
The incident points to a repeatable pattern: a firm that controls a scarce, indispensable input deliberately limits the amount of that input it makes available for production, and at the same time takes actions that prevent other firms from obtaining the same input. By keeping output below the level that would prevail if the input were freely tradable, the incumbent raises the market price of the final good. By blocking entrants, it ensures that the price cannot be competed away through increased supply. The combination of output restriction and entry deterrence lets the incumbent capture a profit that exceeds what would be earned under competitive conditions, and it does so without needing to rely on collusion with rivals; the unilateral control of the bottleneck is sufficient.
The mechanism works because the incumbent’s control over the input is credible and difficult to replicate. Potential entrants cannot simply build a substitute for the input without incurring prohibitive costs, and the incumbent can threaten to withhold the input entirely if a rival attempts to enter. The entrant’s decision to invest is therefore weighed against the risk of being locked out of the essential resource, which shifts the expected return on entry downward. The incumbent, meanwhile, gains from two complementary actions: first, by producing less than the profit‑maximizing level under free entry, it moves left along its marginal cost curve and enjoys a higher price; second, by raising the fixed cost of entry, it reduces the threat of future competition. The net effect is a stable outcome where the incumbent’s quantity is lower and price higher than in a contestable market, and where the incumbent’s profit is protected by the very barrier it created.
Historical examples show the same logic operating in very different settings. In medieval European towns, craft guilds held exclusive rights to practice certain trades. Masters limited the number of apprentices they would train and restricted the total looms or workshops that could operate in the town. By keeping the supply of cloth below what the population could demand, guilds kept prices high. Simultaneously, they used their legal authority to deny outsiders the right to set up competing workshops, effectively raising the cost of entry for new weavers. The result was persistently elevated cloth prices and guild profits that exceeded what a free market of independent weavers would have generated.
In the nineteenth‑century United States, the major railroad firms owned the tracks and terminals that connected producers to markets. Leading carriers such as the Pennsylvania Railroad repeatedly refused to grant trackage rights to rival lines, forcing would‑be entrants to build parallel routes at enormous expense. At the same time, the incumbent railroads curtailed the frequency of service on certain corridors, keeping freight rates above the level that would have prevailed if capacity were freely tradable. The dual strategy of denying access and restricting output allowed the dominant roads to sustain supra‑competitive returns on their infrastructure.
The Organization of the Petroleum Exporting Countries provides a modern illustration. Member states agree to cut crude oil production in order to lift world prices. At the same time, many of those same states have lobbied against policies that would subsidize or mandate renewable‑energy technologies, thereby raising the hurdle for firms that wish to enter the energy market with alternatives to petroleum. By constraining the flow of the incumbent’s core product while impeding the emergence of substitute suppliers, OPEC members have been able to maintain oil prices well above the marginal cost of extraction for extended periods.
The pharmaceutical industry offers another case. Firms that hold a patent on a blockbuster drug often engage in “evergreening”: they obtain secondary patents on slight modifications of the molecule, new formulations, or new methods of use. These additional patents extend the period during which generic manufacturers cannot legally sell the product. In parallel, the same firms sometimes engage in “product hopping,” shifting marketing efforts to a slightly altered version of the drug and withdrawing the original formulation from the market, which makes it harder for generics to find a comparable reference product. The combined effect is to keep the volume of the original drug below what would be sold if generic competition were allowed immediately after the first patent expired, while simultaneously increasing the cost and uncertainty for any generic entrant. The outcome is prolonged high prices and excess profits for the originator firm.
These examples share a common causal skeleton: a dominant actor possesses control over a resource that is essential for producing a good or service; the actor deliberately supplies less of that resource than the market would absorb; the actor also takes steps that raise the cost or prevent the acquisition of that resource by potential rivals; the resulting mismatch between restricted supply and blocked entry sustains a price above the competitive level and yields rents for the incumbent. The logic does not depend on the particular technology, the legal regime, or the historical period; it follows from the geometry of a bottleneck paired with an entry barrier.
Because the mechanism relies only on the ability to withhold an essential input and to deter entry, it can appear in contexts as diverse as labor markets, where a professional association limits the number of licenses it grants while lobbying against deregulation that would allow new practitioners, or in digital platforms, where a firm that controls an API restricts third‑party access while simultaneously imposing restrictive terms that discourage rival platforms from building on the same data. In each case, the incumbent’s profit stems from two linked actions: output suppression and entry impediment.
The persistence of this pattern suggests that merely addressing one side — such as urging the incumbent to increase output — will not eliminate the excess profit if entry barriers remain intact. Likewise, lowering entry barriers without compelling the incumbent to release more of the bottleneck will leave the price elevated because the incumbent can still keep its own production low. Effective intervention must therefore target both margins simultaneously: enforce a rule that ties the incumbent’s output level to the amount of the bottleneck it makes available to others, and prohibit discriminatory refusal to supply that input to potential entrants. Only when the incumbent can no longer profitably withhold the input while also blocking rivals does the incentive to maintain the artificial scarcity disappear.
The recurrence across centuries and sectors shows that the underlying dynamic is not a quirk of a particular industry or a fleeting market fad; it is a structural feature of any setting where a single entity can monopolize a critical input and translate that monopoly into supra‑competitive returns by jointly curtailing supply and shielding itself from competition. Recognizing the joint nature of the two actions is essential for any analysis that seeks to explain why prices stay high despite apparent opportunities for new supply, and for designing remedies that address the root cause rather than its superficial symptoms.