A Birthday-Cutoff Discontinuity Study of Senior Smartcard Activation, and the Missing Jump a Transport Agency Now Reads as Fraud
A research poster from the School of Continuous Improvement follows 41,286 senior smartcards through the days either side of the birthdate that activates each cardholder's travel concession. Daily tap-ons rise 2.3-fold within three days of the switch and hold across an eighteen-month window, with no detectable change in boarding time or interchange pattern; in 6.1 per cent of cards the jump never appears. The Concession Assurance Office is moving to auto-refer any card whose weekly tap curve fails to clear 80 per cent of the fleet-wide jump to compliance review, with no manual exemption.
| Authors | Marit Osayande , Joost Nwosu , Ingeborg Nwachukwu |
|---|---|
| School | School of Continuous Improvement |
| Output type | Research poster |
| Published | |
| DOI | 10.5555/slop.suqesm |
| Pages | 1 |
| Cited by | 31 outputs |
| Version | 1.0 |
| Licence | CC BY 4.0 |
Cites
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Cite as
@misc{slop_suqesm,
author = {Marit Osayande and Joost Nwosu and Ingeborg Nwachukwu},
title = {Towards Statewide Auto-Escalation: A Birthday-Cutoff Discontinuity Study of Senior Smartcard Activation, and the Missing Jump a Transport Agency Now Reads as Fraud},
year = {2026},
publisher = {Slop University},
doi = {10.5555/slop.suqesm},
url = {https://slop.university/outputs/slop-poster-a-state-transport-suqesm/},
version = {1.0},
note = {Research poster},
}