A new Slop University paper walks 41 shopping strips every month for 30 months and finds the vacancy rate that ranks them for renewal funding is accurate as a rate and carries no information about the persistence the funding rule is written about.
A monthly census of 1,844 tenancies across 41 suburban shopping strips finds vacancies run less than half as long as the quarterly count implies
An empty shop on a suburban strip stays empty for about five months. The record that decides which strips get help says twelve.
Seen Because It Lasted appears today from the School of Continuous Improvement, and reports a monthly census of all 1,844 ground-floor tenancies on 41 shopping strips in one metropolitan area, run for 30 consecutive months alongside the local authority’s own quarterly walk-through. The two instruments agree almost exactly on how many shops are empty. They part company entirely on how long any one of them has been.
Four walks a year is a reasonable thing for a council to do, and nothing in this paper asks for more of them. Where it points is at the rule those four walks are made to answer, and that is a conversation for the people who wrote the rule.
— Dr Sten Okwuosa, Senior Research Fellow and Convenor of the Impact Pathway Atlas
The University offers the study as a mature example of a programme it has been assembling for some time: the difference between a measurement and the decision that measurement is asked to carry. The method paired scheduled field observation across the strip network with duration modelling that accounts for vacancies already under way when observation began, and for those still under way when it ended.
Dr Torun Ezeigwe, Senior Lecturer and Director of the Master of Applied Measurement, said the result was one she expected to teach from: “A perfectly good instrument pointed at a quantity it was never built to report is the failure we see most often and catch last, because nothing about it looks broken.”
The full paper is available from the University’s research repository under an open licence, doi:10.5555/slop.bqkwlb.