Antitrust Radar

U.S. economic observatory / evidence across time

Year Comparison Studio

Compare two years using observations that retain the same subject, measure, unit, and period basis. Evidence that cannot be matched remains identified as a gap.

Selectable years
491978-2026
Evidence rows
373kept in source units
Evidence systems
6never combined
Default pairs
252017-2022 example
Exact match keyDomain, entity code, metric, unit, and period basis must all agree before a pair exists.
Same-unit deltaChange is shown in the original unit and over the selected interval, without annualization.
Unmatched stays visibleRecords outside the match remain in separate baseline and comparison inventories.

Same-contract comparison

2017 to 2022

25 exact numeric pairs / 5-year interval / 3 comparable domains
Baseline rows
26
Matched pairs
25
Comparison rows
26
Unmatched rows
2
Linked sources
6

Comparable evidence packet

All exact pairs / 2017-2022

Census sectors

17 exact pairs

Strict same-code and same-label sector medians from matched detailed-industry HHI rows in 2017 and 2022.
51InformationStrict-pair median HHI / calendar year2017568.52022741.4+172.9 HHI points+30.41% vs baseline22UtilitiesStrict-pair median HHI / calendar year2017692.42022602-90.4 HHI points-13.06% vs baseline21Mining, quarrying, and oil and gas extractionStrict-pair median HHI / calendar year2017349.52022390.8+41.3 HHI points+11.82% vs baseline56Administrative and support and waste management and remediation servicesStrict-pair median HHI / calendar year2017140.42022168.8+28.4 HHI points+20.23% vs baseline52Finance and insuranceStrict-pair median HHI / calendar year2017471.52022492.9+21.4 HHI points+4.54% vs baseline31-33ManufacturingStrict-pair median HHI / calendar year20174152022435.6+20.6 HHI points+4.96% vs baseline71Arts, entertainment, and recreationStrict-pair median HHI / calendar year2017132.22022113.7-18.5 HHI points-13.99% vs baseline61Educational servicesStrict-pair median HHI / calendar year201776.7202294.5+17.8 HHI points+23.21% vs baseline54Professional, scientific, and technical servicesStrict-pair median HHI / calendar year201798.4202285.6-12.8 HHI points-13.01% vs baseline81Other services (except public administration)Strict-pair median HHI / calendar year201766.1202277.7+11.6 HHI points+17.55% vs baseline44-45Retail tradeStrict-pair median HHI / calendar year201714202225.4+11.4 HHI points+81.43% vs baseline53Real estate and rental and leasingStrict-pair median HHI / calendar year201793.22022103.8+10.6 HHI points+11.37% vs baseline48-49Transportation and warehousingStrict-pair median HHI / calendar year20172592022251-8 HHI points-3.09% vs baseline23ConstructionStrict-pair median HHI / calendar year201713.3202219.4+6.1 HHI points+45.86% vs baseline42Wholesale tradeStrict-pair median HHI / calendar year2017324.82022322-2.8 HHI points-0.86% vs baseline72Accommodation and food servicesStrict-pair median HHI / calendar year201714.9202214.3-0.6 HHI points-4.03% vs baseline62Health care and social assistanceStrict-pair median HHI / calendar year201735.8202235.80 HHI points0% vs baseline
Sector medians are NAICS screening summaries, not sector HHI values or legally defined antitrust markets.

Business dynamism

6 exact pairs

Published national Census BDS rates for establishment and job flows from 1978 through 2023.
BDS rates describe national establishment and employment flows. They are not concentration measures or causal estimates.

Federal merger activity

2 exact pairs

Federal HSR transaction volume and Second Request rates by fiscal year.
HSR filing volume and review rates describe a federal administrative program, not merger harm, enforcement success, or economy-wide concentration.

Unmatched inventories

Rows outside the exact matching contract

These records remain in the packet. They are not converted into a pair or treated as missing values.

Separate research chronology

Published output is not an economic observation

Briefing dates are shown beside the interval but never matched to evidence rows or included in a delta.
Baseline year20170 research briefings

No research briefing is dated to this year in the current release.

Comparison year20220 research briefings

No research briefing is dated to this year in the current release.

Interval source custody

6 linked public sources

Custody follows every selected baseline and comparison row, including records outside the exact pair set.

A matched row compares only the same evidence domain, entity code, metric, unit, and period basis in both selected years. Unmatched rows remain visible. Deltas are never annualized, combined across measures, treated as causal effects, or converted into a competition score.

Comparison method

A change ledger, not a verdict about competition.

The studio describes how an encoded measure differs between two observed vintages. It does not infer why the measure moved, translate one evidence system into another, or make a legal conclusion.

  1. 01
    Match the full contract

    Require the same domain, entity code, metric identifier, unit, and period basis in both years.

  2. 02
    Compute the exact difference

    Subtract the baseline value from the comparison value and retain the selected interval as context.

  3. 03
    Audit what did not pair

    Read each unmatched inventory and linked source before interpreting coverage or change.

A matched row compares only the same evidence domain, entity code, metric, unit, and period basis in both selected years. Unmatched rows remain visible. Deltas are never annualized, combined across measures, treated as causal effects, or converted into a competition score.

Research handoffs

Move from interval evidence to the complete public record.

The comparison packet is a bounded research view. Use the underlying Yearbook, source dossiers, availability atlas, and methodology to establish scope before a policy claim.

Read the national briefingThe U.S. Competition Landscape / multiple evidence systems, no single score
U.S. Year Comparison Studio | Antitrust Radar