Chicago's central business district has the second-largest concentration of office space in North America.

ECONOMIST: The state of the cities

Across the Kattegat, in Denmark, late at night on November 7th, a gang of about 50 young people went on the rampage on Norrebrogade, a big shopping thoroughfare in a district of Copenhagen with a high concentration of immigrants.

ECONOMIST: Danes on the rampage

Mr Clyburn, who defends his district in federal court next month, has a special interest in ex-servicemen: although he has no military bases in his district, there are several in his state, and his district still has the sixteenth-largest concentration of ex-servicemen in the country.

ECONOMIST: Redistricting