I typically look at how I think things will pan out over a relatively brief timespan: a week, a month, a quarter and, perhaps, a year or so. And yet, I often talk about investing for the long term—holding onto value stocks or buying a house that you’ll keep for a decade or two, for example. Given this, I thought it would be interesting to look at some current data about long-term US population trends and how I interpret them in regard to residential real estate.