Having lived and worked in the Bay Area I would definitely say they are one entity socially and economically. It was not unusual to have people live in San Jose and commute to SF, nor vice versa.
By contrast, Sacramento was clearly not part of that unit, even though it isn’t _that_ much further away. There’s a notable gap between the cities, and the cross-commute rate was near zero. (Emphatically NOT zero, there were some people who commuted in from Sacramento, but those were rare, and I never heard of anyone commuting the other way).
By contrast, Sacramento was clearly not part of that unit, even though it isn’t _that_ much further away. There’s a notable gap between the cities, and the cross-commute rate was near zero. (Emphatically NOT zero, there were some people who commuted in from Sacramento, but those were rare, and I never heard of anyone commuting the other way).