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The opposite is the modern reformation of Say’s law. Supply creates demand, there’s a market clearing price for any quantity. (Cf. Sowell). Sort of a fig leaf of theory to promote supply-side economics.

The two must be interlinked but one person has an idea of a product that doesn’t yet exist, and the creation of the product creates demand. The other has the idea that demand causes suppliers to produce.

Build it and they will come. Another aphorism. Not generally true.

Car sharing is a great idea. The economics are difficult to convey to customers. Keeping enough vehicles in enough places to make it a reasonable facility is difficult, but required to make people see the value. It’s also very hard to convince people to go carless in their current life.




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