An interesting analysis. I think it might be colored a bit by the commercial/residential mix; I know the Blue Line, I know the Red Line, I know the Expo Line, I know the Purple Line and I know the Gold Line:
- BLUE LINE - all looks poor. The Blue Line is Thunderdome. I've seen fistfights start multiple times and homeless cussing at each other over who smells worse (they all win on the Blue Line).
- EXPO LINE - theoretically Crenshaw/USC is poor because the people who "live" in Crenshaw/USC are poor but that misses the USC students who maintain a permanent residence at their parents' house. I have friends who dumpster-dive USC at the end of the semester because you'll find skateboards and LCD televisions and refrigerators thrown away by exchange students going back to Singapore and Dubai at the end of the semester.
- PURPLE LINE - Over half of these stops are business districts. The other half are shopping districts. People live there but the representative sample is different.
- RED LINE - Some over-sampling because until Wilshire/Vermont the Purple Line and the Red Line run on the same tracks and use the same stations (I know, right? That one will bite you in the ass when you're sleepy). The rest of it is business districts until it hits North Hollywood, at which point it hits the Orange Line which I guess they don't count because it's buses. I'd be curious as to which is poorer - the Orange Line or the Blue Line. I'll say this: the Blue Line is 98% African Americans while the Orange Line is 98% Mexican nationals.