Gospel Impact Metric: whether a neighborhood is opening, holding or hardening
Not how hard a place is, but which way it has moved: the 2024 Shalom score minus the 2020 one.
Use it to tell a hard place that is getting better from a comfortable place that is coming apart. A standing score cannot tell them apart.
What is the Gospel Impact Metric?
The Gospel Impact Metric (GIM) is the change in a census tract’s Shalom composite between two eras: GIM = Shalom (latest era) minus Shalom (previous era). On the current U.S. surface that is 2024 minus 2020. A positive GIM means conditions are opening, a negative GIM means they are hardening, and a GIM between −0.7 and +0.8 means the place is holding where it was. On the map the same number is called Gospel Shift.
The two composites it subtracts are scored across the five domains of Shalom v2: Provision & Work, Household & Generations, Life & Health, Social Fabric, and Justice & Protection. The methodology weights them 32.6%, 18.8%, 18.6%, 15.9% and 14.2%. Those weights describe how well each domain can be measured at tract scale, not how much it matters.
Because GIM is a subtraction, the sign carries the meaning. A tract at +6 gained six points of Shalom between the two readings; a tract at −12 lost twelve. Two neighborhoods can carry the same weight today and be moving in opposite directions, and only a change will say so.
What do opening, holding and hardening mean?
Every scored tract is lined up by how far its composite moved and cut into five bands. The edges are anchored to the measured national distribution of the 2020–2024 change, which runs from about −8.7 at the 10th percentile to +7.1 at the 90th, and they are the same edges the Gospel Shift map paints with.
Read the band as a place in line, not a verdict. The cuts are fixed positions in that line-up, so the shares are fixed too: 30% of tracts land in hardening fast because that is the name given to the bottom 30%, not because they were counted there. "Hardening" means a tract moved worse than most others did. By itself it does not mean the place got worse.
- Opening fast: +4.3 or more. Shalom rose sharply; the top fifth of the country.
- Opening: above +0.8 and below +4.3. Shalom rose measurably; the next fifth.
- Holding: −0.7 to +0.8. Shalom barely moved; the middle tenth.
- Hardening: above −3.8 and below −0.7. Shalom fell measurably; the next fifth.
- Hardening fast: −3.8 or less. Shalom fell sharply; the bottom 30%.
How is GIM different from need pressure?
Need pressure is the level: 100 minus the latest Shalom composite, where higher means more current hardship. GIM is the change between two composites. They answer different questions, and reading one as the other inverts the verdict for any tract whose conditions moved against its standing score.
Read them together. High need pressure with a positive GIM is a hard place that is getting better: listen for what is already working and come alongside it. Low need pressure with a sharply negative GIM is a comfortable place coming apart: the hardship may not be visible from the street yet.
The Gospel Desert Index is a third reading again. It measures structural access to evangelical churches and is not built on Shalom at all. The three are used side by side and never blended into one number.
How firm is the number on your street?
Every Shalom score is built from survey estimates, and every survey carries error. Subtract one score from another and both errors come into the answer. For an ordinary neighborhood the four-year change is known to within about seven points either way, nineteen times in twenty. The whole holding band is one and a half points wide. About three fifths of the difference between two neighborhoods’ readings is real difference between those places; the rest is the survey. That is enough to rank with. It is not enough to pronounce with.
There is also a national tilt. The 2016–2020 Census release that serves as the base was collected through the first year of the pandemic and sits about two points high, so subtracting from it pulls the whole line-up left of zero. That is one reason GospelGraph also publishes a long-baseline version, GIM v3, which fits the trend across twelve overlapping ACS windows from 2009–2013 through 2020–2024 and carries about a third of the noise. It covers 59.8% of Shalom’s weight, so it is a change in most of Shalom rather than all of it, and where it cannot establish a direction it says so rather than calling the place steady. The two versions can disagree for a tract, and both can be right: a place that fell for six years and recovered for three has a positive two-era change and a negative long-run slope.
How should a church read the Gospel Impact Metric?
Read the level before the movement. Start with need pressure and the five domain scores, and ask what this place is carrying and which domain carries most of it. Then read GIM to see which way it is going. Use the band to compare neighborhoods as they stand today; reach for the long-baseline view when your question is which way a place has been going over years.
Bring what you find to the people who know the ground: site pastors, deacons, neighbors. They can tell you what a tract is carrying; the data can tell you how it compares. Then set a rhythm. ACS indicators update on a rolling five-year average, so read trends over three to five years rather than reacting to one release.
Do not use the number to label people or to bypass local leaders, and never present a score as if it were wisdom. For a worked example, the Anne Arundel County field study sets both ways of measuring change side by side across 130 neighborhoods and shows where they disagree. State of the Field reads the direction of travel nationally, and The desert moved to the growth edge asks where the ground is opening fastest.
What GIM does not claim
GIM does not measure grace, repentance or the Spirit’s hidden work. A rising GIM does not prove that any ministry caused it. Conditions are shaped by policy, markets, migration and investment on timescales that swamp any single congregation. A rising number in a tract where your church has served for a decade is an encouragement and a good reason to ask why. It is not evidence that the church produced it. The full methodology states what each layer on the platform reads.
Common questions
What is the Gospel Impact Metric?
Is GIM the same as Gospel Shift?
How is GIM different from need pressure?
How precise is a tract’s GIM?
Why call it Gospel impact?
See which way your neighborhood is moving
A free field report shows the tract’s Shalom domains and its movement since 2020, with the limits stated beside them.