Families leaving NYC: births aren’t the issue, migration is

NYC’s under-18 population is falling despite positive natural change because the child population shift is driven by families moving to the suburbs

I was surprised to find this in the data re: families leaving NYC: the natural change in kids <18 (births minus aging out of childhood) is actually +ve in the city, -ve in the 'burbs. The reason the population of kids is declining in the ci