Toll Bros., the largest U.S. luxury-home builder, is beginning development of high-end college dormitories, according to Chief Executive Officer Douglas Yearley. The dorms will be off campus, starting at two East Coast universities the company will identify later. The buildings won't be affiliated with the schools, giving Horsham, Penn.-based Toll Bros. (TOL) greater control of the properties, such as managing the rent, Yearley said. They will