1. Title as the costume question
Is the café queue the 25% tipping point?
2. The answer in one line, and the correct name
No. The 25% figure comes from an online naming game, not from queues. A queue that draws people in is better described as an information cascade: people copy the people in front of them.
3. Why the costume feels right
Both describe a crowd that suddenly moves together, and "25%" is a memorable number. (Editor's framing, not a finding.)
4. The difference that matters
Where the 25% comes from. 194 people online, in 10 groups of 20 to 30, played a game of agreeing on a name. When a committed minority reached about 25% of a group, it tipped the group's convention; minorities of 25 to 27% reached 72 to 100% uptake. In the authors' model, the size of the tipping point depends on how many past interactions people remember (Centola et al., Science, 2018).
What a queue is more likely to be. An informational cascade happens when it is rational for a person, having seen what those ahead did, "to follow the behavior of the preceding individual without regard to his own information." The same theory explains why mass behaviour can be fragile (Bikhchandani, Hirshleifer & Welch, Journal of Political Economy, 1992).
So: a tipping point needs a committed minority pushing a convention; a cascade needs people copying those ahead instead of using their own information, and it can break easily.
5. The correct mechanism's badge and two cases
Not yet stamped. Two cases are not yet written.
6. Open gaps
- No study of real café or restaurant queues has been checked yet.
- Whether the 25% threshold holds outside a coordination game is not shown by the 2018 study.
