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 planeBank HHI x leader share9 exact pairs · r 0.92

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 state, FDIC SOD reporting date, and holding-company aggregation ruleLatest pair per entity · Northeast · both-side evidence

Paired visualization

State bank-deposit HHI and leading-holder share

9 exact pairs in this slice

Exact pairs: 9; all plotted
Correlation: +0.92; Strong positive association
R²: 0.84; descriptive linear fit
Evidence: 0; verified on both sides

Paired comparison cohort

0 / 5 entities · fixed 9-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 pairRhode IslandRI · 2025 · Northeast

Bank-deposit HHI: 2,083; Estimated public · High
Bank leader share: 37.8%; Estimated public · High

Median positionAt or above both slice medians

X source: fdic-sod-2025
Y source: fdic-sod-2025

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.

Bank-deposit HHI100.0%51 matched of 51

Bank leader share100.0%51 matched of 51

State banking indicators are computed from 2025 FDIC Summary of Deposits branch balances grouped to the reported top holding company when available. They are statewide deposit screens, not local banking-market definitions, and do not cover every banking product. Association between the two measures is mechanical context, not a finding about competition or consumer outcomes.

Higher / higher5

Higher X / lower Y0

Lower X / higher Y1

Lower / lower3

Quadrants use this filtered slice's medians: 1,106 and 23.0%.

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

202551+0.96

Census region ledger4 visible

Group	Pairs	X avg.	Y avg.	r
South	17	1.1K	22.3%	+0.98
West	13	1.3K	22.8%	+0.95
Midwest	12	1K	19.3%	+0.96
Northeast	9	1.2K	25.6%	+0.92

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-bank-deposit-hhi-leader-share&group=Northeast CSV exportComplete filtered exact pairs Pairing methodSame state, FDIC SOD reporting date, and holding-company aggregation rule

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