A new statistical analysis of Airbnb listings shows the short-term-rental service is growing worldwide, but suggests that many hosts don't stick with it. Intermittent commercial uses of residences could be seen in the planning context of "mixed use."
Donald Trump invokes the darkest days of urban decay and crime to appeal to his base. The facts speak to an urban triumph that has led to greater national prosperity and higher standards of living for tens of millions of Americans.
Unlike Asia and South America, sub-Saharan Africa did not see birthrates fall in the second half of the 20th century. As a result, urban life in Nigeria heralds the challenges facing an increasingly populous planet, Elisabeth Rosenthal reports.