# Tinkerbell Effect
The Tinkerbell effect is an expression in psychology and finance to describe things that are thought to exist only because people believe in them. Effectively a shared collective delusion at a critical scale.

See also [high-control group](high-control-group.md), [NFT](nft.md), [bandwagon-bias](bandwagon-bias.md) and [endowment-effect](endowment-effect.md).