It’s a big country, which among other things means that something that generally characterizes the nation may not be pertinent to the conditions prevailing in dozens of communities. Here’s an example. We are now in the midst of the third longest economic expansion in U.S. history. The nation’s unemployment rate is at roughly a decade low, but as indicated by writer Jeffery Sparshott, nearly a third of America’s cities and suburbs have failed to regain all of the jobs they lost during the most recent recession.