When I post about lifting the ban on supersonic flight, smart commenters show up with charts: optimal fuel burn is at Mach 0.78–0.84, they say, or no one wants to pay thousands to save a few hours. Maybe. But my reply is always the same: Bottled water!
In 2024, Americans spent $47 billion a year on H₂O that they could get for nearly free. That still boggles my mind—but bottled water has passed the market test. I argue for lifting the SST ban, and similar policies, not because we know supersonics will work but because we don’t. Hayek reminds us that competition is a discovery procedure. Like science, markets generate knowledge by experiment—hypotheses are posted as prices, and the public accepts or rejects them through revealed preference. Fred Smith’s FedEx plan got a “C” in the classroom, but the market graded the experiment and returned an A in equity. Theory is great, but just as in science, there is no substitute for running the experiment.
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