Measuring Impact: Methods That Reveal What Works
Difference-in-differences compares outcome trends on an improved corridor with a similar, unimproved corridor before and after a project. It helps isolate the treatment effect. Mind shocks like new zoning or a factory closure. What comparison corridors could your team credibly justify?
Measuring Impact: Methods That Reveal What Works
Accessibility is about how many opportunities people can reasonably reach. Track jobs within forty-five minutes by transit, clinics within fifteen by foot, or suppliers within one hour by truck. Weight reliability. What accessibility lens would best reflect your community’s priorities and constraints?