I know the article you mean but couldn't find it. But the Schelling Segregation Model seems to fit the bill: http://en.wikipedia.org/wiki/Thomas_Schelling#Model

I know the article you mean but couldn't find it. But the Schelling Segregation Model seems to fit the bill: http://en.wikipedia.org/wiki/Thomas_Schelling#Models_of_Segregation http://en.wikipedia.org/wiki/Thomas_Schelling#Models_of_Segr...