Dynamic pricing, not discriminatory pricing
There’s a great bagel shop near my house that has consistently long lines on weekend mornings. This is a market failure: if the line is predictably and consistently long, then the price in dollars is not high enough. The bagel shop could charge more on weekend mornings, which makes them better off; the average customer would then pay more in dollars but less in time.1
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The mixture of customers might change. In a higher price regime, people who were previously excluded by the high time cost of the line (busy parents?) might opt in, while people who can’t afford the new higher price opt out. ↩