Researchers have proposed a number of theories over the years — from sensory overload to the economic value of time.
New York tops the Economist's new list of competitive cities.
A condom company is developing products for sexual privacy in this ultra-dense city-state, such as a screen that fits over car windows to make the vehicle look empty.
In The Spirit of Cities, author Daniel A. Bell tries to capture a city's essence, in brief
Geographer Joel Kotkin says the bigger problem is low birth rates in developed countries
A new study makes the fundamental case for congestion pricing
Most of the world's capacity for economic growth is centered in its metro areas. Which cities top the list?