There's a lot of assumptions here. I'm not sure they're true. (1) Cities are getting richer and richer. More and more rich people are living in the cities, in

There's a lot of assumptions here. I'm not sure they're true. (1) Cities are getting richer and richer. More and more rich people are living in the cities, in dense urban environment. This is why America's urban housing stock is so expensive (2) Most poor people in America have cars. > Why does it end up translating so poorly here, even in larger cities where we have public transit (though significantly worse) and we have relatively high density, relatively walkable, cities? In large cities there are convenience stores everywhere?