Detailed-industry lab

Industry comparison studio

Compare official Census industry measures and matched 2017-2022 observations. Industry categories, broad sectors, and curated antitrust markets remain distinct.

Universe899Detailed rows

Measures6Fixed benchmarks

Coverage2017–23Three Census layers

Comparable here

National six-digit rows sharing the employer-firm universe and revenue-based concentration basis; signed changes require an identical code, level, sector, and label in both Census tables.

Still requires judgment

A relative rank is a screening signal. Product and geographic market definition, competitive effects, entry, and legal conclusions require separate evidence.

Selection console

Choose two to four detailed industries

Every rank and percentile uses the same 899 six-digit NAICS rows, so hierarchy level stays fixed across the comparison.

4 / 4

01 / 621320

Offices of optometrists

Health care and social assistance

HHI21.7Revenue$20.1B

Evidence profile

02 / 813910

Business associations

Other services (except public administration)

HHI20Revenue$30.2B

Evidence profile

03 / 238130

Framing contractors

Construction

HHI20Revenue$29.1B

Evidence profile

04 / 812199

Other personal care services

Other services (except public administration)

HHI13.4Revenue$13.7B

Evidence profile

Research workflow

Carry the selected industries into analysis and publication4 canonical industry profiles / 0 of 6 currently saved

Atlas workspace Draft brief

Relative percentile matrix

Compare position before comparing raw scale

Every measure uses a fixed 0-100 percentile benchmark. Exact raw values, national ranks, and disclosure gaps remain visible beside the shared 50th-percentile marker.

Benchmark universe / 899 industries

Focal industryOffices of optometristsNAICS 621320 / Health care and social assistance

01 / percentile profile

HHI

Revenue-based HHI

Detailed median284

02 / percentile profile

CR4

Largest four firms

Detailed median30.6%

03 / percentile profile

CR8

Largest eight firms

Detailed median42.8%

04 / percentile profile

Revenue

Detailed median$14.5B

05 / percentile profile

Employment

Detailed median40.1K

06 / percentile profile

Firms

Employer firms

Detailed median1.2K

Highest selected HHI21.7Offices of optometrists

Largest selected revenue$30.2BBusiness associations

Sector scope3Cross-sector screen

HHI disclosure gaps04 published in selection

Reusable selection

Combined JSON4 exact Census rows Combined CSVNotebook-ready download

Census structure neighborhood

Discover comparable industry fingerprints

Find six-digit industries with the smallest mean gap across national percentile positions, using only dimensions published for the reference row.

Reference industry

Measurement lens

Candidate scope

Reference: NAICS 621320; Offices of optometrists
Fixed benchmark: 899; National six-digit rows
Matched dimensions: 6 / 6; HHI, CR4, CR8, Revenue, Jobs, Firms
Eligible candidates: 678; 898 rows in selected scope

Nearest published fingerprints

Lower gaps mean closer national percentile positions across the matched dimensions.

10 nearest shown

Neighbor 01 / NAICS 813910

Business associations

Other services (except public administration)

Mean gap3.4 pts

Concentration1.1 pts

Scale5.8 pts

National percentile positionsReferenceNeighbor

HHI0.3 gap21.720

CR42.7 gap7.8%6.5%

CR80.3 gap10.1%10%

Revenue9.7 gap$20.1B$30.2B

Jobs5.0 gap148.9K111.8K

Firms2.7 gap18.6K14.6K

Closest dimension: CR8 (0.3 pts). Widest: Revenue (9.7 pts).

Profile Pair JSON Nearest CSV

Two-vintage comparison

Compare how the selected rows moved, not only where they landed

The same six Census measures, strict matching rule, and national detailed-industry benchmark now travel with the selection.

2017 / 20224 strict / 4 selected

Herfindahl-Hirschman Index / HHI points

Shared signed-change scale across this selection

National median +3.6 pts

Lower changeZeroHigher change

621320Measure unavailable

Offices of optometrists

Health care and social assistance

2017Not published202221.7ChangeNot comparedNo rate

Outside strict-pair rankNot ranked

813910Strict match

Business associations

Other services (except public administration)

201717.4202220Change+2.6 pts+14.9%

National rank #287 of 54347.2th percentile

238130Strict match

Framing contractors

Construction

201712.2202220Change+7.8 pts+63.9%

National rank #251 of 54353.9th percentile

812199Strict match

Other personal care services

Other services (except public administration)

20177.3202213.4Change+6.1 pts+83.6%

National rank #256 of 54353th percentile

Change benchmark

Paired coverage: 543 / 789
National median: +3.6 pts
Selected pairs: 3 / 4
Largest selected move: +7.8 pts

Framing contractors has the largest absolute published move in this selection.

Open national change plane Selection history JSON Selection history CSV

2017 source 2022 source

Six-measure change ledger

Change in six Census measures for the selected industries
National median	621320	813910	238130	812199
+3.6 pts	Not comparedMeasure unavailable	+2.6 pts#287 of 543	+7.8 pts#251 of 543	+6.1 pts#256 of 543
+0.2 pts	+4.4 pts#164 of 781	+0.8 pts#354 of 781	+1.4 pts#305 of 781	+1.5 pts#304 of 781
+0.5 pts	+5.8 pts#108 of 783	+1.3 pts#328 of 783	+1.9 pts#276 of 783	+2.3 pts#261 of 783
+$3B	+$4.6B#321 of 789	+$2.6B#416 of 789	+$13B#154 of 789	+$5.6B#279 of 789
+1,474	+20,005#105 of 789	-4,354#699 of 789	+17,938#116 of 789	+38,714#65 of 789
0	-1,045#764 of 789	-822#758 of 789	+1,522#76 of 789	+6,543#21 of 789

Cross-grain research context

Move between industry, sector, and market evidence without mixing them

Keep the selected six-digit cohort fixed while inspecting broad-sector flows or exact curated market bridges. Every layer retains its own universe, vintage, and permitted use.

Cohort: 4; six-digit rows
Sectors: 3; parent contexts
Bridged: 0/4; 0 markets
Evidence: 0; records + reports

2017 / Industry baselineStrict same-code and same-label Census rows

2022 / Current structureIndustry values and parent-sector distributions

2023 / Broad-sector flowsBDS establishment and job-flow rates

Parent sector / NAICS 62

Health care and social assistance

621320

2022 sector distribution

Median HHI: 35.8; 39 detailed rows
Median CR4: 8.4%; Published values
Selected here: 1; Not a sector aggregate

2017-2022 strict history

Median HHI change: +1.4; HHI points
Higher HHI: 53.8%; of published pairs
Coverage: 68.4%; 26 strict pairs

2023 BDS rates

Entry: 10.783%; establishments
Exit: 7.708%; establishments
Net jobs: 4.089%; net rate
Reallocation: 18.899%; excess rate

Parent sector / NAICS 81

Other services (except public administration)

813910 812199

2022 sector distribution

Median HHI: 54.3; 40 detailed rows
Median CR4: 12.8%; Published values
Selected here: 2; Not a sector aggregate

2017-2022 strict history

Median HHI change: +3.6; HHI points
Higher HHI: 72.7%; of published pairs
Coverage: 57.9%; 22 strict pairs

2023 BDS rates

Entry: 9.993%; establishments
Exit: 8.146%; establishments
Net jobs: 3.63%; net rate
Reallocation: 23.006%; excess rate

Parent sector / NAICS 23

Construction

238130

2022 sector distribution

Median HHI: 19.4; 31 detailed rows
Median CR4: 6.4%; Published values
Selected here: 1; Not a sector aggregate

2017-2022 strict history

Median HHI change: +1.6; HHI points
Higher HHI: 62.5%; of published pairs
Coverage: 77.4%; 24 strict pairs

2023 BDS rates

Entry: 13.016%; establishments
Exit: 11.082%; establishments
Net jobs: 3.24%; net rate
Reallocation: 26.939%; excess rate

Compare parent sectorsSeparate structure and flow plane Joined sector JSON3 exact rows Full BDS historiesSelected sectors plus national series Joined sector CSVNotebook-ready context rows BDS history CSV1978-2023 selected-sector series

Raw values and benchmark positions

Inspect the exact benchmark ledger

Ranks run from highest to lowest. Percentiles show the share of published detailed-industry values at or below each row.

Raw Census values and detailed-industry benchmark positions for selected industries
Measure	Detailed median	Offices of optometrists621320	Business associations813910	Framing contractors238130	Other personal care services812199
HHIRevenue-based HHI	28450th percentile	21.710th percentile / rank #615 of 679	209th percentile / rank #617 of 679	209th percentile / rank #617 of 679	13.46th percentile / rank #637 of 679
CR4Largest four firms	30.6%50th percentile	7.8%10th percentile / rank #806 of 897	6.5%8th percentile / rank #830 of 897	5.9%6th percentile / rank #845 of 897	5.9%6th percentile / rank #845 of 897
CR8Largest eight firms	42.8%50th percentile	10.1%8th percentile / rank #824 of 899	10%8th percentile / rank #826 of 899	9%7th percentile / rank #840 of 899	8.4%6th percentile / rank #849 of 899
RevenueRevenue	$14.5B50th percentile	$20.1B60th percentile / rank #361 of 899	$30.2B70th percentile / rank #273 of 899	$29.1B69th percentile / rank #281 of 899	$13.7B47th percentile / rank #476 of 899
EmploymentEmployment	40.1K50th percentile	148.9K81st percentile / rank #169 of 899	111.8K76th percentile / rank #214 of 899	103.6K74th percentile / rank #233 of 899	177.3K84th percentile / rank #148 of 899
FirmsEmployer firms	1.2K50th percentile	18.6K91st percentile / rank #78 of 899	14.6K89th percentile / rank #103 of 899	13K88th percentile / rank #109 of 899	26.7K94th percentile / rank #58 of 899

NAICS industries are national statistical screening categories, not legally defined antitrust markets. Cross-sector comparisons describe relative Census position; they do not establish product substitutability, geographic scope, market power, or liability.