Joel Kotkin and Ali Modarres worry about the lack of kids in urban areas:
Increasingly, our great American cities, from New York and Chicago to Los Angeles and Seattle, are evolving into playgrounds for the rich, traps for the poor, and way stations for the ambitious young en route eventually to less congested places. The middle-class family has been pushed to the margins, breaking dramatically with urban history. The development raises at least two important questions: Are cities without children sustainable? And are they desirable?
The trend they find troubling:
Over the past two decades, the percentage of families that have children has fallen in most of the country, but nowhere more dramatically than in our largest, densest urban areas. In cities with populations greater than 500,000, the population of children aged 14 and younger actually declined between 2000 and 2010, according to U.S. Census data, with New York, Chicago, Los Angeles, and Detroit experiencing the largest numerical drop. Many urban school districts—such as Chicago, which has 145,000 fewer school-age children than it had a decade ago—have seen enrollments plummet and are busily closing schools. The 14-and-younger population increased in only about one-third of all census-designated places, with the greatest rate of growth occurring in smaller urban areas with fewer than 250,000 residents.