Loss Aversion(Loss Aversion)

The tendency to weight losses more heavily than equivalent gains. A core component of Kahneman and Tversky’s prospect theory (1979), with empirical estimates typically placing the loss multiplier between 1.5 and 2.5.

Framings such as “you’ll lose access when the free trial ends” or “only a few left in stock” exploit this asymmetry. Recent work on AI-driven personalized pricing, however, suggests that overly aggressive loss framings can erode trust and reduce long-run profit, so designers should calibrate carefully.