Why is broadband more expensive in the US?

Why is broadband more expensive in the US?  Alternatively, why I use dialed up in 2001?

http://www.bbc.co.uk/news/magazine-24528383

I remember when I was a senior in 2001, I moved off-campus.  Once I looked at the cost of broadband, $50/month, I opted to use Vanderbilt dial up instead.  Yes, it was slow, yes, it cuts out every hour, but it was free.