What Is The Profile Of The Average Person Who Defaulted On His Subprime Mortgage?

It seems that the subprime mortgage debacle has turned out to be very serious, so much so, that it has world-wide implications. Even here in China, the Chinese are worried about it. Does it make sense to analyze this problem, to see what caused it so that it doesn’t happen again? Why don’t we start by looking at the actual person who defaults on his loan. What kind of person is he? What demographic does he fit? What is his profile?