The Justice Department has struggled to convince jurors to convict defendants accused of crafting agreements that restrict workers’ mobility. WASHINGTON—Federal prosecutors are scheduled to begin a trial Monday in which a former Pratt & Whitney manager is accused of conspiring with his suppliers to prevent them from poaching one another’s workers, in a new test of the government’s more aggressive antitrust strategy. The case, in federal court in Bridgeport, Conn., is the latest example of a new category of prosecution: collusion among employers to restrict workers’ mobility or wages. The Justice Department has struggled to convince jurors at three prior trials to convict defendants accused of crafting such agreements.

---