- High prices often appear with high demand, not because price increases demand, but because both were driven by market conditions.
- A model optimized for prediction error will learn this biased relationship and can misestimate price elasticity.
- The result: a model can score well on RMSE yet behave poorly when used to simulate price changes.
- High prices often appear with high demand, not because price increases demand, but because both were driven by market conditions.
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