Is the era of fixed prices over? Changing prices for what the market will bear has long been a staple of pricing for everything from airplane seats to a gallon of gas to hotel rooms. Indeed, an entire field of so-called “dynamic pricing” exists to figure out how to extract the most profit from the most willing customers has now emerged. But we’re at an inflection point now in which such practices are going from the exception, and for relatively few items, to the norm. The regulatory framework is at the moment right in the midst of figuring out what the guardrails will be.