[Solved] For a given reaction, a change in the pressure may result in a change in the sign of ΔG. Vertical Boycott: An anti-competitive practice where companies at different supply chain levels agree not to deal with a particular company or group. Sherman Act: A landmark federal statute in the anti-trust law of the United States that prohibits monopolistic practices and promotes competition. Price-Cutter: An individual or company that significantly reduces the prices of goods or services, typically to attract more customers or to outcompete rivals. Naked Horizontal Restraint: An antitrust term referring to an agreement between competitors at the same level of the market structure to limit competition among themselves, such as price fixing or market division.