FT.com: Why clothes stores should be bothered
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"There are already fewer women in the 15-24 age group - 4m compared with 4.2m men. But by 2015 there will be 3.85m females against 4m men .... businesses focused on teenagers may also feel the pain. Teen magazines, already suffering because of competition from the internet, are likely to struggle to cope with the loss of another 10 per cent of their target demographic."