Missing from the article, it seemed to me, is evidence of the claim that the east side is generally poorer. I mean, that seems to jive with my anecdotal experience and the explanation for the phenomenon makes intuitive sense, but is there any hard evidence for this statement?
Here's a 1999 map of median per capita income by census track: http://www.lib.uchicago.edu/e/su/maps/percapitaincomecity199...
Note that Chicago proper is outlined in bold. While the southern shore is poorer and more easterly than the south loop/downtown/north shore areas, I think you'd be hard pressed to argue that the east side of Chicago is poorer than the west.
Also of note, the north and east is not only where the rich people in Chicago live, it is simply where the people in Chicago live. I wasn't able to find a raw population distribution map, but here's one showing multi-unit vs. single family homes: http://www.lib.uchicago.edu/e/su/maps/dwellingtypescity2000....
(FWIW, I lived on Chicago's south east side for ~15 years. Depending on what you are looking for it is one of the best and most unappreciated areas of the city.)
Same for the non-San Jose parts of Silicon Valley: Palo Alto and Mountain View are ritzier than neighboring Sunnyvale and Santa Clara. I don't know enough about San Jose itself to say, nor about San Francisco. In SF, though, it seems like many of the ritzier areas (Pac Heights, Marina, Marin) are to the north.
NYC is a notable exception: Harlem and the Bronx are in the north, while SoHo, Tribeca, Greenwich Village, etc. are all in the south.
I've never understood why South San Francisco is quite so neglected while commuter cities like Redwood City do so well. It's literally the next-closest town, why is it not super-expensive there?
For the neighborhoods of southern San Francisco, you are looking at historically highly industrialized areas. White collar workers didn't want to be there and ended in San Mateo County.
For South San Francisco, I disagree on it being neglected. Sure it isn't as rich as Redwood City, but it is a far cry from say East Palo Alto or Richmond. (You can also note the many luxury apartments and high-end office buildings popping up). Like southern San Francisco, it historically was hurt by being, as the San Bruno Mountain sign reminds everyone, the industrial city.
While easterlies may have caused dislocation during a certain time period, most major cities have experienced other events which have also had a significant impact on their demography.
While westerlies may have caused dislocation during a certain time period, most major cities have experienced other events which have also had a significant impact on their demography.
In other words, the most northern parts of the island are also the most eastern, so it currently fits the pattern quite well.
South LA is about 20 minutes from the ocean, by car. I would generalize that any part of Los Angeles that's further than 15 minutes from the ocean or the mountains (there are several mountain ranges to choose from) is relatively poor.