. i dont think theres a bigger fashion week though each is associated with a certain kind of style...london being eccentric and fresh, newyork being more of safe and edging towards commercial, milan being all about sex and lots of luxury and paris being more about revolutionary fashion
Fashionistas tend to recognise Paris as the biggest hse and NY as the lowest not in terms of designers but content
2. Paris fashion week or New york is not exclusively French/American respectively. Thats why Vivienne westwood has shows in Ldn and Paris...
3. not sure abt the 3rd qn
2