Shafir v. Steele, 431 Mass. 365, 370 n.10 (2000). "In order to make out a claim for interference with advantageous business relations, the plaintiff must prove that (1) he had a business relationship for economic benefit with a third party, (2) the defendants knew of the relationship, (3) the defendants interfered with the relationship through improper motive or means, and (4) the plaintiff's loss of advantage resulted directly from the defendants' conduct." Kurker v. Hill, 44 Mass. App. Ct. 184, 191 (1998). To make out a claim of tortious interference with contractual relations, a plaintiff must demonstrate that "(1) he had a contract with a third party; (2) the defendant knowingly induced the third party to break that contract; (3) the defendant's interference, in addition to being intentional, was improper in motive or means; and (4) the plaintiff was harmed by the defendant's actions." Draghetti v. Chmielewski, 416 Mass. 808, 816 (1994). "mproper conduct, beyond the interference itself, is 'an element both in the proof of intentional interference with performance of a contract . . . and in the proof of intentional interference with a prospective contractual relationship.' " Hunneman Real Estate Corp. v. Norwood Realty, Inc., 54 Mass. App. Ct. 416, 427 (2002), quoting from United Truck Leasing Corp. v. Geltman, 406 Mass. 811, 816 (1990).