Industry screen / published
Libraries and archives
2022 Economic Census employer-firm concentration screen for NAICS 51921.
- Revenue HHI
- 254.8
- Evidence context
- 2K firms / 2.7B revenue
Research observatory / publication desk
Research Set Briefing
Prepare a brief from a saved collection of profiles and sources. Documented relationships and original definitions remain attached to the evidence.
- Profiles
- 21 families
- Pair routes
- 11 connected
- Supporting edges
- 1exact declarations
- Sources
- 11 route-bound
2Profiles
1Pair routes
1Exact edges
1Custody sources
51921 Libraries and ar...5192 Web search portal...
Declared routesDirect edges and multi-hop paths remain distinct.
Bounded interpretationNavigation never becomes liability, causation, or market definition.
Reusable publicationShare URL, Markdown, JSON, BibTeX, RIS, and print output.
Research memo / deterministic evidence synthesis
Competition research memo: 51921 Libraries and ar... and 5192 Web search portal...
A methods-forward memo across 2 canonical profiles, preserving exact declarations, multi-hop research paths, source custody, and open empirical questions.- Profiles
- 2
- 1 evidence families
- Pair routes
- 1
- 1 connected
- Direct pairs
- 1
- Exact endpoint edges
- Supporting edges
- 1
- 0 connectors
- Sources
- 1
- 1 route-bound
Executive synthesis
What the selected evidence establishes
1 of 1 profile pair has at least one direct declared edge; 0 are connected only through a reproducible multi-hop route. The packet carries 1 exact supporting edge and 1 source-custody record: 1 route-bound without aggregating the profiles into a score.
1 direct0 bridged0 disconnected
Canonical scope
Profile evidence register
Priority routes
Declared links and open questions
Direct declaration / 1 source record
51921 Libraries and ar...5192 Web search portal...
1 exact declared edge: NAICS parent classification.
Research questionHow should the timing, scope, and competitive significance of the declared NAICS parent classification between 51921 Libraries and ar... and 5192 Web search portal... be tested with additional observations?
Interpretation boundary
The workspace assembles canonical profiles and declared Atlas edges for research navigation. A direct edge preserves only its encoded evidence statement. A multi-hop route does not establish a direct endpoint relationship, make unlike measures comparable, define a legal market, assign ownership, control, liability, or causation, or prove a policy effect.
Profile-linked custody records document the selected profiles. They do not substantiate a selected pair route unless the same source also appears on a route-bearing edge.
Publication standard
A dossier records the evidence route before it frames the research question.
Every audience mode uses the same profiles, paths, edges, and sources. Only the framing of the next question changes.
- 01Declare the scope
Name each canonical profile and retain its metric, period, status, and profile route.
- 02Separate route status
Direct, bridged, and disconnected pairs remain explicit throughout the packet.
- 03Publish the boundary
Carry source custody, edge guardrails, and missing evidence into every export.
Research handoffs
Continue in the underlying analytical surface.
The dossier frames an evidence route. Profiles, the Atlas, source dossiers, and public data remain authoritative.