Exact relationship builder

Indicator comparison lab

Compare two measures while keeping their entities, periods, units, and source populations visible. A visual association does not establish causation.

Build comparison Open data

Active planeState HHI x leader share51 exact pairs · r 0.96

Relationship planes15declared contracts

Exact pairs6,194entity-period matches

Domains6bounded universes

Imputation0missing sides filled

Comparable hereExact pairs, within-contract ranks, coverage, and descriptive association.

Never inferred hereCausation, legal market findings, forward-filled values, or a national composite score.

Read method

Comparison controls

Build an exact paired slice

Paired measuresPeriodCensus regionEntity search

Evidence scopeAll source records

Evidence sidePublic sourceData statusConfidence

Exact pairing ruleSame jurisdiction, market scope, and calendar yearLatest pair per entity · both-side evidence

Paired visualization

State HHI and leading-insurer share

51 exact pairs in this slice

Exact pairs: 51; all plotted
Correlation: +0.96; Strong positive association
R²: 0.92; descriptive linear fit
Evidence: 0; verified on both sides

Paired comparison cohort

0 / 5 entities · fixed 51-pair benchmark

Select a point, then add it or its nearest exact-pair peers.

The cohort changes the overlay and exact export only. Full-slice medians, correlation, quadrants, and coverage remain fixed.

Selected exact pairDistrict of ColumbiaDC · 2024 · South

State HHI: 6,945; Estimated public · High
State leader share: 81.0%; Estimated public · High

Median positionAt or above both slice medians

X source: kff-individual-insurance-market-2024
Y source: kff-individual-insurance-market-2024

Research handoff4 canonical profiles

Open context map

Entity profile X dossier Y dossier

Coverage diagnostics

What entered the plane, and what did not

Pairing coverage is reported separately for each indicator denominator. A matched row is not evidence that either source covers the full underlying economy.

State HHI100.0%51 matched of 51

State leader share100.0%51 matched of 51

State indicators describe the 2024 ACA-regulated individual health insurance market only. They do not measure a state's overall economy or employer-sponsored insurance. Association between the two measures does not establish causation.

Higher / higher24

Higher X / lower Y2

Lower X / higher Y2

Lower / lower23

Quadrants use this filtered slice's medians: 3,414 and 47.0%.

Slice ledgers

Period and group structure

Counts and correlations stay inside exact paired rows. Small groups may be too thin for a stable descriptive association.

Period coverage1 period

202451+0.96

Census region ledger4 visible

Group	Pairs	X avg.	Y avg.	r
South	17	3.8K	51.1%	+0.95
West	13	3.5K	46.3%	+0.98
Midwest	12	3.3K	43.6%	+0.96
Northeast	9	4K	52.1%	+0.96

Reusable comparison packet

Carry the exact contract into analysis

The endpoint returns every matched row in the filtered slice, both observation identifiers, both source routes, evidence status, confidence, entity, group, and period.

JSON packet/api/public/indicators?relationship=state-hhi-leader-share CSV exportComplete filtered exact pairs Pairing methodSame jurisdiction, market scope, and calendar year

This lab compares only declared same-entity, same-period pairs. Missing sides are excluded rather than imputed, correlation remains descriptive, and unlike universes are never combined into a composite market-power score.

Relationship directory