“When people first move into a neighborhood, usually it is families with young children,” said Susan K. Brown, a sociology professor [emerita] at the University of California, Irvine. “The neighborhood fills up with families that are, say, four people on average. Over time, spouses die, kids move out, and the number of people in each household will decline.” “The result is over time, most neighborhoods will have contracting populations even without families changing,” she said. 

For the full story, please visit https://www.latimes.com/california/story/2023-05-11/orange-county-big-shift-older-cities-lose-population-as-irvine-south-county-boom.