The American economy isn’t actually becoming more concentrated: Opportunity is clustering, but people and growth aren’t by Matthew Yglesias. Excerpts:
"Economic opportunity is becoming more concentrated, but
Americans’ ability to move to take advantage of that opportunity is
declining. Consequently, the rising average incomes in big coastal
cities are being offset by those cities’ declining share of the
population."
"America’s metropolitan areas are becoming more unequal, with per capita
income rising faster in a small number of already affluent metro areas.
This accords with the basic intuition that the growth sectors of the
American economy — high tech, finance, biomedical devices — are largely
concentrated in a few large coastal areas, while the plethora of
manufacturing centers that dotted much of the country decades ago have
declined."
"this has not led aggregate economic activity to be more concentrated in those affluent cities."
"How can New York get richer without growing its share of the overall
national economy? The answer is that these same affluent metro areas
contain a shrinking share of the country’s overall population."
"Today, instead of heading to the metro areas that offer the highest
wages, Americans are generally moving to places like Atlanta, Dallas,
and Nashville, where economic opportunities are mediocre at best.
The reason for this is not too mysterious.
The price of a house — especially one in a neighborhood
that’s considered to have good public schools — in the suburbs of
Boston, Washington, or San Francisco is prohibitive. Young people of all
kinds move to the central cities of the great coastal metropolises
despite the rent squeezing, making do with roommates and cramped
apartments. But middle-class grown-ups face vicious trade-offs between
space, commuting time, and money.
If you happen to earn a good living with specialized
skills in a locally dominant industry, the math generally works out. New
York bankers and Silicon Valley engineers pay exorbitant housing costs
but make commensurate salaries.
A mere dental hygienist, high school math teacher, chef, hairstylist, or physical therapist would
also
earn a higher average wage in the Seattle area than in the Sunbelt. But
in most cases, the difference isn’t enough to compensate for the higher
cost of living. The result is that Americans as a whole are
“moving to stagnation,” voluntarily accepting lower pay in lower-productivity places in order to avoid the bite of housing costs.
The problem in a literal sense is that high-wage coastal
cities are adjacent to oceans and thus have fewer dimensions of freedom
in which to sprawl without creating untenable commuting conditions.
America does, however, possess the technological capacity
to construct large numbers of dwellings on relatively small parcels of
land. It happens to be the case that across most of the land in
America’s suburbs — and even in America’s central cities — it is illegal
to construct the attached rowhouses and small-scale duplex and triplex
apartments that historically provided the bulk of America’s cheap
housing stock. And where rowhouse neighborhoods exist and have become
inordinately expensive, it is almost universally illegal to knock them
down and replace them with large apartment buildings."