Antitrust Radar
Public program / comparative questions

Research agenda observatory

Research Question Comparison Studio

Compare research questions and the observations that motivate them. Shared topics and sources are explicit, while each measure retains its own unit and period.

Opening contract topology9 repeated IDs4 shared by all selected questions
Selected research-question comparison topologySelected public research questions connect only where an exact topic, source, method, entity, metric, or evidence-request identifier repeats.Q39HHIQ38CR4Q40Leader share
Exact repeated identifiers only0 inferred links
Public questions
46
available to compare
Selected
3
of 4 maximum
Contract dimensions
6
kept separate
Composite scores
0
not calculated

Public question comparison

3 research questions

30 exact contract memberships / reviewed through Jul 17, 2026
Comparison set

Select two to four public research questions

3 / 4
Observed systems
1
1 exact entity
Metric families
3
2 native units
Exact overlap
9
4 shared by all
Source custody
1
1 repeated source ID
Research design
2
8 unique requests

Comparative evidence note

What this selection establishes

01 / Measurement3 metric families remain in 2 native units.

No value, change, or rank is summed across questions. Signal geometry shows direction within each row only.

02 / Shared custody9 exact identifiers recur in two or more question contracts.

2 topics, 1 sources, and 4 evidence requests repeat.

03 / Comparability3 pairs share an entity; 0 share a metric ID.

Entity overlap, metric overlap, anchor alignment, and source overlap remain separate diagnostics.

Repeated-identifier topology

Links encode exact shared contract items

Line width reflects repeated-ID count, not quantitative similarity.
Exact overlap among selected public research questionsQuestion nodes connect only when they repeat an exact topic, source, method, entity, metric, or evidence-request identifier. Line width represents repeated item count.Q39Search enginesQ38Search enginesQ40Search engines
9 exact repeated items / 4 shared by every selected question.

Shared inventory

Inspect what repeats and where

9 matching identifiers
Research topicsDigital PlatformsAR-T02Q39Q38Q40Research topicsMarket StructureAR-T01Q39Q38Q40Source custodySearch engine market share in United States of America, April 2023-April 2026StatCounter Global StatsQ39Q38Q40Empirical methodsShare accountingReconstruct participant-share movement while checking denominator, coverage, entry, exit, and transaction changes.Q38Q40Signal entitiesSearch enginesus-search-engine-usageQ39Q38Q40Evidence requestsCoverage, missing-participant, and residual-category documentation for each anchor.Declared evidence to collectQ38Q40Evidence requestsFirm- or product-level shares at both anchors using the same denominator.Declared evidence to collectQ38Q40Evidence requestsShare changes attributable to entry, exit, acquisition, divestiture, or organic movement.Declared evidence to collectQ38Q40Evidence requestsSource methodology showing whether measurement and participant classification stayed stable.Declared evidence to collectQ38Q40

Pair audit

What each pair actually has in common

Same-entity and same-metric are reported separately.
Search engineswithSearch engines4210
Search engineswithSearch engines4210
Search engineswithSearch engines9214

Comparison boundary. Question comparisons preserve each signal's exact anchors, unit, universe, method, and source custody. Shared links represent repeated identifiers only. Native values are never placed on one common scale, and overlap counts are inventories rather than scores of similarity, priority, evidentiary quality, competitive harm, causation, or legal significance.

Evidence standard