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 planeMarket HHI x leader share5 exact pairs · r 0.95

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 measuresPeriodSectorEntity search

Evidence scopeAll source records

Evidence sidePublic sourceData statusConfidence

Exact pairing ruleSame documented market and release yearLatest pair per entity · both-side evidence

Market structure triangulation

Read concentration through three bounded measures

Switch among every exact pair without treating HHI, CR4, and leader share as interchangeable or additive.

Trace exact paths

52 exact pair rowsThree declared edges / four released periods

Each edge is an independent descriptive contract. Shared arithmetic is disclosed, missing sides stay missing, and no three-measure composite score is produced.

Paired visualization

Tracked market HHI and leading-participant share

5 exact pairs in this slice

Exact pairs: 5; all plotted
Correlation: +0.95; Strong positive association
R²: 0.90; descriptive linear fit
Evidence: 0; verified on both sides

Paired comparison cohort

0 / 5 entities · fixed 5-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 pairSearch enginesus-search-engine-usage · 2026 · Digital platforms

Market HHI: 7,359; Estimated public · Medium
Market leader share: 85.2%; Estimated public · Low

Median positionAt or above both slice medians

X source: statcounter-search-us-2026
Y source: statcounter-search-us-2026

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.

Market HHI65.4%17 matched of 26

Market leader share94.4%17 matched of 18

Only common-release observations are paired. The leading participant's squared share is one component of HHI, so association is partly mechanical; it does not independently establish dominance, durable control, or a legal market finding.

Higher / higher2

Higher X / lower Y1

Lower X / higher Y1

Lower / lower1

Quadrants use this filtered slice's medians: 4,995 and 67.1%.

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 coverage4 periods

20234+0.98 20244+0.97 20254+0.96 20265+0.95

Sector ledger2 visible

Group	Pairs	X avg.	Y avg.	r
Digital platforms	4	5.6K	71.1%	+0.91
Software	1	3.6K	50.0%	N/A

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=market-hhi-leader-share CSV exportComplete filtered exact pairs Pairing methodSame documented market and release 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