R. H. Macy & Co. will open three "Aeropostale" stores, its initial entry into specialty retailing, in November in Hoboken, N.J., Short Hills, N.J., and Pleasanton, Calif . . . News International, a company controlled by Rupert Murdoch, has increased its stake in Pearson PLC, publisher of Britain's Financial Times, to 13.5% from 4.9% . . . . . . Plenum Publishing Corp. dropped its $143-million bid for Cambridge, Mass.-based Arthur D. Little Inc., citing the rejection of the offer by an employee trust fund that owns controlling interest in the consulting firm.