What is the bandwagon effect?
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The Bias: Why do restaurants with lines get longer lines?
We follow the crowd as a quality signal. Others' choices feel like evidence. Source: Wikipedia – Bandwagon effect
Where It Shows Up: Where does it show up?
Investment manias. Rising prices attract buyers, which raises prices. Source: Wikipedia – Economic bubble
The Fix: Fix?
Ask what you'd think if nobody else were doing it. Separate the signal from the herd. Source: Wikipedia – Bandwagon effect