The start of New York Fashion Week today signals the start of the bi-annual cycle of international fashion week. With everyone's attention fixed on the top four cities, New York, London, Milan and Paris, FashionUnited questions how much does each city really benefit from the semi-annnual fashion circus? Does the Big Apple really generate more revenue than the US Open and the New York City Marathon? And how much money do fashion lovers really spend during their fashion week visits? FashionUnited takes a closer look and calculates the each costs and incomes each Fashion Weeks brings to the top nine International Fashion Weeks:

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