NEW YORK – Some of the top fashion brands reeling in female luxury shoppers include Chanel and Prada, according to a recent survey by the New York-based Luxury Institute. As the industry gears up for fashion week, the institute decided to examine wealthy consumers’ experiences with fashion brands. In its Luxury Customer Experience Index – billed as the first study of its kind – the Luxury Institute asked respondents which fashion designer brands they purchased in the past 18 months, among a series of other questions. “Part of the trick for a luxury brand is to grow stores and product lines – but not break the brand’s image with that growth,” said Milton Pedraza, chief executive officer of the Luxury Institute. The firm surveyed over 1,000 female consumers (average age 45, average annual household income, $681,000). For complete coverage, see tomorrow’s WWD.