There is a very simple location model in economics called Hotelling's Law, which explains that in a one-dimensional space, two firms can each produce the largest market share by locating in the center of the "linear city." I realize that to those of you with a background in economics, this is likely unnecessary, and to those of you without one, this may come off as gibberish. So I'll try to give a brief primer to the latter, and the former can skip down a bit.
