The March issues of fashion magazines -- "generally considered a harbinger for the magazine industry" -- are tracking respectable ad page gains for the second year in a row, writes Emma Bazilian. At first place, per usual, is Vogue, "with 457 ad pages, up 4.5 percent from 2012. Archrival Time Inc.'s InStyle weighed in with 361 pages, a 4 percent increase over last year. At Hearst, Elle, came in third at 338 pages, up 6 percent."