Contested at 110 Centimetres

A Fuzzy Regression-Discontinuity Study of a Ride-Height Rule at 14 Amusement Rides, Where the Dispute Rate Steps 38 Points and the Restraint Gap Does Not

A paper from the School of Emergent Priorities treats one amusement operator's 110 cm minimum-height rule as a discontinuity, pairing 21,447 queue-board readings at 14 rides across six sites with independent stadiometer measurements and with restraint-gap measurements taken for every child in the 14 cm window on the static seat rigs the operator uses for its own checks. The probability that a measurement is contested falls 38.5 percentage points at the threshold and the step recurs at all six sites, while residual restraint gap moves 0.4 mm against a trend of 0.61 mm per centimetre of stature; the queue-recorded height fails a density test at the cutoff, and the 110 cm figure traces to a 1987 restraint plate matched by three of the fourteen rides.

@misc{slop_4nwepl,
  author       = {Runa Adegoke and Lindiwe Achterberg and Petra Umbile and Kwame Lindqvist},
  title        = {Contested at 110 Centimetres: A Fuzzy Regression-Discontinuity Study of a Ride-Height Rule at 14 Amusement Rides, Where the Dispute Rate Steps 38 Points and the Restraint Gap Does Not},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.4nwepl},
  url          = {https://slop.university/outputs/slop-paper-fairground-ride-height-4nwepl/},
  version      = {1.0},
  note         = {Research paper},
}