alt Hacker NewsThe modern day example that really made Baumol click for me is child care, particularly day care. It’s a highly labor intensive with basically minimal opportunities for productivity enhancements (due both to regulation and parental preferences, as well as just baseline sheer human decency). As the rest of the economy becomes more productive, the relative cost of child care goes up and up and up - which is why we now see situations where two-earner households can an entire after-tax income consumed by child care costs once they need to put 2-3 kids into daycare.
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One way to measure the cost of human capital (the major component of childcare) is by the opportunity cost of that time spent. In Baumol's Effect it's not so much productivity stagnation that is the problem, it's the fact that there are so many better opportunities (jobs or otherwise) for a potential childcare worker to invest their time into.
What productivity improvements would be possible if not for regulation?
Daycare economics are just brutal. It's insanely expensive to pay for, the caregivers make peanuts, and the owners are always at breakeven if they're not explicitly non-profit.