A Stepped-Wedge Comparison Across 1,184 Circulations and Two Lending Seasons
A paper from the School of Emergent Priorities evaluates a two-person handover count in a postal jigsaw-lending club, in which the sending and receiving custodians count a puzzle independently and reconcile before the circulation closes. Across six branches, fourteen four-week periods, and 1,184 circulations, the protocol produces no detectable reduction in piece loss (adjusted difference -0.04 pieces per circulation, 95% CI -0.31 to 0.23), while verification effort accumulates to 852 counter-hours; the null is reported in full, and the club retains the protocol and reports its counter-hours as a member-participation figure.
| Authors | Kwame Lindqvist, Runa Adegoke, Ronja Oyelaran, Lindiwe Achterberg |
|---|---|
| School | School of Emergent Priorities |
| Output type | Research paper |
| Funding | Anticipatory Capability Fund: Setting a Retirement Date for a Suburb's Temporary Detour Signs at Installation ($317,564)Anticipatory Capability Fund: Restocking a Council's Street Libraries Before the Shelf Stops Turning Over ($241,873)Anticipatory Capability Fund: Running the Roster Consultation Before a Surf Club Drafts Its Handover Note ($419,637) |
| Published | |
| DOI | 10.5555/slop.sdn90v |
| Pages | 6 |
| Version | 1.0 |
| Licence | CC BY 4.0 |
Cites
Cite as
@misc{slop_sdn90v,
author = {Kwame Lindqvist and Runa Adegoke and Ronja Oyelaran and Lindiwe Achterberg},
title = {Two-Person Piece Counts Do Not Reduce Piece Loss in a Postal Jigsaw-Lending Club: A Stepped-Wedge Comparison Across 1,184 Circulations and Two Lending Seasons},
year = {2026},
publisher = {Slop University},
doi = {10.5555/slop.sdn90v},
url = {https://slop.university/outputs/slop-paper-two-person-piece-counts-sdn90v/},
version = {1.0},
note = {Research paper},
}