At its most basic level, which type of antitrust violation is a conspiracy between business competitors to set their prices to buy or sell goods or services at a certain price point?

Group boycotting involves competitors collectively refusing to deal with a particular supplier or vendor, aiming to pressure that entity into compliance with certain demands. While it is an antitrust violation, it does not specifically involve setting prices but rather is about exerting influence through collective refusal to engage in business.

Market allocation is an agreement between competitors to divide markets among themselves, whether by geography or product type. This type of violation prevents competition in designated areas but does not directly involve manipulating prices, which is the core focus of price fixing.

A tie-in arrangement is a practice where a seller requires a buyer to purchase a second product in order to buy the first one. This can limit consumer choice and competition, but it does not involve a direct agreement among competitors to set prices, making it distinct from price fixing.