[31reasons]

Silicon Valley and New York or any place in the US are in the same country. Its much easier for entrepreneurs to move to Bay Area and work on their projects than stay in their home town and try to duplicate it. So the reason I think there exist only one Silicon Valley in the US is less friction to move there. While citizens of other countries have very high friction (visa, culture etc) to move to Silicon Valley. So yes I believe if you can make your country's laws entrepreneur friendly you can too create something equivalent to SV. But the laws don't exist independently, they are mere reflection of the values and culture of the country.