Antitrust Radar
Market atlas

Economic observatory / longitudinal evidence

Market trend observatory

Follow published concentration measures over time. Every point retains its market definition, period, source, and the limits of comparison with other observations.

Selected evidence route

Search engines / HHI
Series
4 anchors2023-2026
Sources
1 recordStatCounter Global Stats
Context
3 recordsofficial context

Public anchor horizon

Where bounded market histories exist

x = release year
line = same measure
Public concentration anchors by market and yearFifty-nine source-backed HHI, CR4, and leading-participant share anchors across eight observed market definitions. Horizontal position represents release year, color identifies the bounded measure, hollow points retain definition restrictions, dashed paths join released anchors for the same measure without estimating intervening years, and every point opens its exact market series.Beef meatpacking1980-2019Beef meatpacking; Four-participant concentration ratio; 1980; 36%; U.S. Department of Agriculture Economic Research Service.Beef meatpacking; Four-participant concentration ratio; 1995; 81%; U.S. Department of Agriculture Economic Research Service.Beef meatpacking; Four-participant concentration ratio; 2019; 85%; U.S. Department of Agriculture Economic Research Service.Wireless service2017-2023Wireless service; Herfindahl-Hirschman Index; 2017; 3,106; Federal Communications Commission.Wireless service; Herfindahl-Hirschman Index; 2021; 3,596; Federal Communications Commission.Wireless service; Herfindahl-Hirschman Index; 2023; 3,550; Federal Communications Commission.Fixed broadband2020-2024Fixed broadband; Herfindahl-Hirschman Index; 2020; 1,171; Federal Communications Commission.Fixed broadband; Herfindahl-Hirschman Index; 2021; 1,199; Federal Communications Commission.Fixed broadband; Herfindahl-Hirschman Index; 2022; 1,287; Federal Communications Commission.Fixed broadband; Herfindahl-Hirschman Index; 2023; 1,195; Federal Communications Commission.Fixed broadband; Herfindahl-Hirschman Index; 2024; 1,501; Federal Communications Commission.Browsers2023-2026Browsers; Herfindahl-Hirschman Index; 2023; 3,664; StatCounter Global Stats.Browsers; Herfindahl-Hirschman Index; 2024; 3,846; StatCounter Global Stats.Browsers; Herfindahl-Hirschman Index; 2025; 3,720; StatCounter Global Stats.Browsers; Herfindahl-Hirschman Index; 2026; 3,612; StatCounter Global Stats.Browsers; Four-participant concentration ratio; 2023; 95.14%; StatCounter Global Stats.Browsers; Four-participant concentration ratio; 2024; 95.55%; StatCounter Global Stats.Browsers; Four-participant concentration ratio; 2025; 93.61%; StatCounter Global Stats.Browsers; Four-participant concentration ratio; 2026; 93.76%; StatCounter Global Stats.Browsers; Leading-participant share; 2023; 48.62%; StatCounter Global Stats.Browsers; Leading-participant share; 2024; 52.96%; StatCounter Global Stats.Browsers; Leading-participant share; 2025; 52.32%; StatCounter Global Stats.Browsers; Leading-participant share; 2026; 50.03%; StatCounter Global Stats.Mobile operating systems2023-2026Mobile operating systems; Herfindahl-Hirschman Index; 2023; 5,157; StatCounter Global Stats.Mobile operating systems; Herfindahl-Hirschman Index; 2024; 5,055; StatCounter Global Stats.Mobile operating systems; Herfindahl-Hirschman Index; 2025; 5,094; StatCounter Global Stats.Mobile operating systems; Herfindahl-Hirschman Index; 2026; 5,337; StatCounter Global Stats.Mobile operating systems; Four-participant concentration ratio; 2023; 99.87%; StatCounter Global Stats.Mobile operating systems; Four-participant concentration ratio; 2024; 99.91%; StatCounter Global Stats.Mobile operating systems; Four-participant concentration ratio; 2025; 99.96%; StatCounter Global Stats.Mobile operating systems; Four-participant concentration ratio; 2026; 100%; StatCounter Global Stats.Mobile operating systems; Leading-participant share; 2023; 59.89%; StatCounter Global Stats.Mobile operating systems; Leading-participant share; 2024; 56.53%; StatCounter Global Stats.Mobile operating systems; Leading-participant share; 2025; 57.6%; StatCounter Global Stats.Mobile operating systems; Leading-participant share; 2026; 63.08%; StatCounter Global Stats.Search engines2023-2026Search engines; Herfindahl-Hirschman Index; 2023; 7,950; StatCounter Global Stats.Search engines; Herfindahl-Hirschman Index; 2024; 7,575; StatCounter Global Stats.Search engines; Herfindahl-Hirschman Index; 2025; 7,589; StatCounter Global Stats.Search engines; Herfindahl-Hirschman Index; 2026; 7,359; StatCounter Global Stats.Search engines; Four-participant concentration ratio; 2023; 99.62%; StatCounter Global Stats.Search engines; Four-participant concentration ratio; 2024; 99.49%; StatCounter Global Stats.Search engines; Four-participant concentration ratio; 2025; 99.41%; StatCounter Global Stats.Search engines; Four-participant concentration ratio; 2026; 99.39%; StatCounter Global Stats.Search engines; Leading-participant share; 2023; 88.88%; StatCounter Global Stats.Search engines; Leading-participant share; 2024; 86.58%; StatCounter Global Stats.Search engines; Leading-participant share; 2025; 86.71%; StatCounter Global Stats.Search engines; Leading-participant share; 2026; 85.16%; StatCounter Global Stats.Social referrals2023-2026Social referrals; Herfindahl-Hirschman Index; 2023; 3,393; StatCounter Global Stats.Social referrals; Herfindahl-Hirschman Index; 2024; 2,838; StatCounter Global Stats.Social referrals; Herfindahl-Hirschman Index; 2025; 3,804; StatCounter Global Stats.Social referrals; Herfindahl-Hirschman Index; 2026; 4,995; StatCounter Global Stats.Social referrals; Four-participant concentration ratio; 2023; 96.26%; StatCounter Global Stats.Social referrals; Four-participant concentration ratio; 2024; 90.93%; StatCounter Global Stats.Social referrals; Four-participant concentration ratio; 2025; 95.09%; StatCounter Global Stats.Social referrals; Four-participant concentration ratio; 2026; 94.38%; StatCounter Global Stats.Social referrals; Leading-participant share; 2023; 51.95%; StatCounter Global Stats.Social referrals; Leading-participant share; 2024; 45.96%; StatCounter Global Stats.Social referrals; Leading-participant share; 2025; 57.45%; StatCounter Global Stats.Social referrals; Leading-participant share; 2026; 68.94%; StatCounter Global Stats.Individual insurance2024-2024Individual insurance; Herfindahl-Hirschman Index; 2024; 3,650; KFF.AI assistants2026-2026AI assistants; Herfindahl-Hirschman Index; 2026; 4,804; StatCounter Global Stats.AI assistants; Four-participant concentration ratio; 2026; 94.77%; StatCounter Global Stats.AI assistants; Leading-participant share; 2026; 67.13%; StatCounter Global Stats.Domestic airlines2026-2026Domestic airlines; Four-participant concentration ratio; 2026; 69%; Bureau of Transportation Statistics.Domestic airlines; Leading-participant share; 2026; 17.8%; Bureau of Transportation Statistics.
HHICR4Leader shareDefinition-restricted
Public anchors
653 bounded measures
Observed markets
102 definitions awaiting measures
Comparable histories
71980-2026
Official records
1410 source records
Anchors, not estimatesEvery point is a released observation. Dashed paths expose evidence continuity without filling or carrying values across missing years.
Definitions before comparisonThe horizon locates evidence in time; it does not rank unlike products, geographies, denominators, or measure families on one value scale.

Configurable longitudinal evidence

Build an anchor series

Choose the measure, market definitions, evidence window, and transformation. Every plotted point remains tied to its public source.

Selected

3

of 5 maximum

Published

3

markets with anchors

Plotted

3

definition-eligible

Anchors

11

2017-2026

Sources

3

unique records

Events

5

context shown

Market definitions

Select up to five

3/5

Evidence window

HHI / Level

Herfindahl-Hirschman Index

Source-reported or transparently calculated concentration anchors.

No anchor in windowSearch enginesUnited States / Digital platforms

No HHI anchor was released inside 2017-2026.

Search engines, 2023: 7,950; StatCounter Global StatsSearch engines, 2024: 7,575; StatCounter Global StatsSearch engines, 2025: 7,589; StatCounter Global StatsSearch engines, 2026: 7,359; StatCounter Global StatsBrowsers, 2023: 3,664; StatCounter Global StatsBrowsers, 2024: 3,846; StatCounter Global StatsBrowsers, 2025: 3,720; StatCounter Global StatsBrowsers, 2026: 3,612; StatCounter Global StatsWireless service, 2017: 3,106; Federal Communications CommissionWireless service, 2021: 3,596; Federal Communications CommissionWireless service, 2023: 3,550; Federal Communications Commission

Dashed segments connect public anchors for legibility; they do not estimate missing years. Event lines provide timing context only and do not identify causal effects.

Active definition

Search engines

Digital platforms / United States

Anchors4
Series usecomparable anchors

Measurement basis

StatCounter search engine referral usage share

Cross-market posture

screen only

Usage share is a web-analytics proxy and should not be presented as search-query share or search-advertising revenue share.

Latest in window

7,359

2026

computed from public shares with residual other

StatCounter Global Stats
Open profile historyCompare definitions

Anchor rule

No annual values are filled, carried forward, or interpolated. Index and change modes re-express only the published anchors inside the chosen window.

Definition rule

Product boundaries, geographies, denominators, and metric families remain distinct. Screens are not merged into a synthetic economy-wide finding.

Policy context

Official records in the selected window

5 shown
2019remedy

T-Mobile-Sprint settlement requires divestitures to support wireless entry

U.S. Department of Justice / Jul 26, 2019

2020litigation

United States files search monopolization complaint against Google

U.S. Department of Justice / Oct 20, 2020

2024decision

Court finds Google liable for unlawful search monopoly maintenance

U.S. District Court for the District of Columbia / Aug 5, 2024

2024monitoring

FCC releases 2024 Communications Marketplace Report

Federal Communications Commission / Dec 31, 2024

2025remedy

Court orders search distribution and data-access remedies

U.S. District Court for the District of Columbia / Sep 2, 2025

3 shown records are linked to the active definition. Timing context does not establish attribution or causal effect.

Research workflow

Carry this exact trend context into analysis and publication

3 market definitions + HHI / 11 released anchors / 2017-2026Canonical indicator: market-hhi / 0 of 6 profiles currently saved
Atlas workspaceDraft brief