The company behind the real estate trade publication Banker & Tradesman plans to sell off two of its business units and lay off nearly half its staff. The Warren Group, publisher of Banker & Tradesman, said it will sell off its custom publishing and events businesses to Connecticut-based American Business Media LLC, a company owned by Vincent M. Valvo, a former editor and publisher of B&T. Tim Warren, whose family has operated The Warren Group since 1872, said in an interview that the company will...