And here it is: Baby Bust: The Demographics of Global Depression.
This is not a great article; the "Paleolithic Village" example/image is completely unhelpful. But it touches on several items I haven't really seen discussed in this particular way:
- Any economy is finite. I guess this is obvious, but its implications aren't always clear.
- One of the implications is that while there's always a shortage of goods (which everyone understands, because this fact is fundamental to the meaning of prices) there are sometimes shortages of consumers.
- Another is that there can also be a shortage of savers and investors.
- The Baby Boom is in decline, and leaving its prime working years.
- This means that apart from the sub-prime-mortgage-driven housing bubble, there's an underlying fundamental shift in the meaning of the single-family home as an investment vehicle.
References to other articles, apparently by the same author, are here.