"The formula effect generally, and particularly in the case of clothing, is dependent not just on the choice of index but also on the characteristics of the price movements and levels being measured, sample design, choice of baseperiod and price collection methods, " said its spokeswoman Jill Leyland.
For example, if Sprint is able to increase its prepaid share of the U.S. wireless market past 6% by the end of our forecast period, as opposed to our base forecast of roughly 5%, there could be 15% upside to our price estimate.