PhiladelphiaAlgorithm

Movers: change between two years

The Movers table is simply each school's value in the later year minus its value in the earlier year, for schools with an unsuppressed all-students value in both years, sorted by that change.

1
How it was computedSteps
1. delta = value(to year) − value(from year).
Inputs: two served cells per school
Evidence: philly-schools.ts — search "getPhillyMovers"
2
Assumptions & caveatsAssumptions
- No adjustment for school size — small schools swing more year to year (see the working analysis, Figure 7).