Why the hardest part of a conspiracy is staying honest
In short: Collusion is the ultimate economic paradox: to maximize profits, rivals must cooperate, but to keep those profits, they must never betray one another. It is a high-stakes game of chicken where the biggest threat to a secret agreement isn't the law—it's the temptation of the next big score.
Collusion occurs when firms secretly coordinate to limit competition, often by fixing prices, dividing markets, or limiting production. While explicit agreements—where companies communicate directly—are illegal in most major economies like the US and EU, 'tacit collusion' is a different beast. In tacit collusion, companies coordinate behavior through observation without ever speaking. Because there is no paper trail or recorded conversation, this form of cooperation is generally not considered illegal, even though it produces the same economic harm to consumers as a formal conspiracy.
The stability of a cartel depends on a mathematical threshold of trust and punishment. According to game theory, a collusive alliance remains stable only if the discount factor (the value of future profits) is high enough to outweigh the immediate gains of cheating. Specifically, the number of firms (n) dictates the difficulty: as more firms enter a market, the minimum discount required for collusion to succeed increases. If the profit from a one-off deviation is greater than the discounted future profits of staying in the group, the alliance collapses.
To survive, colluding firms must create credible threats of punishment. They often use mechanisms to ensure that any firm attempting to undercut the group faces a significant, detectable loss. This is especially true in oligopolies, where there are few firms and significant market impact. However, collusion is naturally fragile; it requires long-term vision and repeated interactions. In a one-off situation, high prices are rarely sustainable because the incentive to cheat is too great. The goal is to ensure that the loss of deviation is always more impactful than the incremental gain of a temporary price cut.
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Sources
- Summary by Intellect · source: Collusion
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