In a U.S. desktop field experiment, an AI Overview reduced outbound organic clicks by 39.8% relative when it appeared and increased zero-click searches by 34.5%, without a measured user-experience gain.

SocioLens project,

Claim LD10-HQ-C12 (v1.0)

Research opportunities this claim motivates

What this claim leaves open for research. Each is a hypothesis about a gap, not a finding.

Do AI answers in search cut clicks to outside sites on phones and outside the US?Gives the US desktop field estimate (39.8% relative fewer outbound organic clicks when an AI Overview appeared); explicitly does not license mobile or international effects.

Provenance and status

Claim type: Estimate
Publication status: Eligible for publication, with qualifiers: version
Verification state: Checked against the primary source; the check used its current version (recorded as “CONTENT VERIFIED CURRENT VERSION”). Who checked this claim is not recorded for it; claim checks so far were AI-led, and no person has checked claims against their sources.
Does not license: 40-point drop in all Google traffic, mobile/international effects or long-run adaptation
Limitations: Desktop; short horizon; working paper
Source (as cited): Agarwal & Sen, SSRN 6513059, revised 8 Jul 2026
Source type: Working paper (recorded as “Working paper”)
Institutional position: Independent academic
Maturity of the evidence: Emerging evidence
Recorded date: 25 September 2026
Currentness / correction: This is the current version. No correction or concern is recorded on its sources.

Sources this version cites

Saharsh Agarwal & Ananya Sen, “The Impact of Google AI Overviews on Publisher Traffic and User Experience: Evidence from a Field Experiment,” SSRN 6513059. (Working paper)
No checked link to the original yet.

Version

This is the current version, v1.0. Earlier versions stay available, and their records never change.

Versions: v1.0 · current

Raw record: every recorded field, with its coded values

All 25 canonical Claim fields, verbatim, with the coded values derived from them. The plain-language labels above are read from these.

Claim type (coded): ESTIMATE (as printed: “ESTIMATE”)
Publication status (coded): ELIGIBLE (VERSION) (as printed: “ELIGIBLE WITH VERSION QUALIFIER”)
Verification state (coded): CONTENT_VERIFIED_PRIMARY (CURRENT_VERSION)
Source type (coded): WORKING_PAPER
Maturity (coded): EMERGING

#	Canonical field	Canonical value (verbatim)	Normalized (Claim Value Vocabulary v1.0.2)
1	CLAIM ID	LD10-HQ-C12	—
2	PUBLIC-FACING CLAIM	In a U.S. desktop field experiment, an AI Overview reduced outbound organic clicks by 39.8% relative when it appeared and increased zero-click searches by 34.5%, without a measured user-experience gain.	—
3	CLAIM TYPE	ESTIMATE	base_types: ESTIMATE
4	RESEARCH STRAND	C — Intermediation/search	—
5	MATURITY	EMERGING	states: EMERGING
6	SOURCE	Agarwal & Sen, SSRN 6513059, revised 8 Jul 2026	source_ids: SRC-LD10-AGARWAL-SEN-2026
7	SOURCE TYPE	Working paper	classes: WORKING_PAPER
8	INSTITUTIONAL POSITION	Independent academic	—
9	SCOPE	U.S. desktop Chrome; Jan–Feb 2026	—
10	DESIGN	Randomized field experiment	—
11	SAMPLE / DATASET	~1,065 users	—
12	MODEL / TOOL / VERSION	Google AI Overviews	—
13	COMPARATOR	AIO visible vs hidden	—
14	MAIN RESULT	−39.8% outbound organic clicks; +34.5% zero-click searches; sponsored clicks unaffected	—
15	INFERENTIAL TARGET	Causal referral diversion conditional on AIO appearance	—
16	DOES NOT LICENSE	40-point drop in all Google traffic, mobile/international effects or long-run adaptation	—
17	VERIFICATION STATE	CONTENT VERIFIED CURRENT VERSION	state: CONTENT_VERIFIED_PRIMARY · qualifiers: CURRENT_VERSION · verified_by: UNKNOWN
18	LIMITATIONS	Desktop; short horizon; working paper	—
19	CONTRADICTORY / SUPPORTING SOURCES	C13 causal and C14 observational evidence consistent	—
20	GEOGRAPHY / LANGUAGE	US / English	—
21	DISTRIBUTIONAL LEDGER	Publishers lose referrals while sponsored clicks were unaffected	—
22	R01 / FIELD-MAP LINKS	D7, D1, D3, L-C	—
23	WHAT WOULD CHANGE THIS CLAIM?	Mobile/non-U.S. replication or later revised paper	—
24	PUBLICATION STATUS	ELIGIBLE WITH VERSION QUALIFIER	state: ELIGIBLE · qualifiers: VERSION
25	RECORDED DATE	2026-09-25	—

Field 22 references resolved against Field Map v0.2: D7 (DOMAIN); D1 (DOMAIN); D3 (DOMAIN); L-C (LENS)

The sources as recorded, with their record IDs and coded source types:

Pinned Sources (field 6, version-specific)

“Agarwal & Sen, SSRN 6513059, revised 8 Jul 2026” → Saharsh Agarwal & Ananya Sen, “The Impact of Google AI…” (SRC-LD10-AGARWAL-SEN-2026--v1.0) — Saharsh Agarwal & Ananya Sen, “The Impact of Google AI Overviews on Publisher Traffic and User Experience: Evidence from a Field Experiment,” SSRN 6513059.; class WORKING_PAPER (explicit public provenance pin)

Cited by Living Debate versions

Persuasion, Intermediation & the Information Order (v0.1) LD-10
Raw record: where this debate places the claim, with its coded facets
HQ placement: SC-LD10-01; facets: exposure_mode=DEFAULT_EMBEDDED_ANSWER_LAYER, outcome_type=OUTBOUND_REFERRAL_CLICK_BEHAVIOUR, horizon=SHORT_TERM_FIELD_EXPERIMENT, model_vintage=GOOGLE_AI_OVERVIEWS_2026, secondary_scaffold_relevance=SC-LD10-04 BEHAVIOURAL_TRANSMISSION

Cite this page

SocioLens project. (2026, September 25). In a U.S. desktop field experiment, an AI Overview reduced outbound organic clicks by 39.8% relative when it appeared and increased zero-click searches by 34.5%, without a measured user-experience gain [Claim LD10-HQ-C12, version v1.0]. SocioLens. https://sociolens-web.pages.dev/claims/ld10-hq-c12/v1.0/

@misc{sociolens_ld10_hq_c12_v1_0,
  author = {{SocioLens project}},
  title = {In a U.S. desktop field experiment, an AI Overview reduced outbound organic clicks by 39.8\% relative when it appeared and increased zero-click searches by 34.5\%, without a measured user-experience gain.},
  year = {2026},
  date = {2026-09-25},
  howpublished = {\url{https://sociolens-web.pages.dev/claims/ld10-hq-c12/v1.0/}},
  note = {Claim LD10-HQ-C12, version v1.0}
}

The link points to this version, whose record never changes. For a finding, cite the original study as well: SocioLens summarizes research and does not replace it.

Research-of-record provenance

Materialized by sociolens-materializer 0.6.0 at 2026-09-28T20:00:00.000Z; normalization contract SocioLens — Claim Value Vocabulary v1.0.2 — Pre-Spike Materialization Contract (v1.0.2). Content seal SHA-256 bd8a0b7ad197da8fb0af825443bd557fa29f53ae2c38e02a3b8f6eade3ff1d67.

Frozen Drive-derived inputs

R07 — LD-10 Canonical Claim Ledger v1.0 — LOCKED (v1.0) — Drive ID 1TwCjF7zxWTDs4bDvwQfEb5hbMAMuMu3vmK53kcOdo54; revision: NOT_EXPOSED_BY_DRIVE_TEXT_EXPORT; Drive modified 2026-09-25T21:56:50.285Z; block “ENTRY 12 — LD10-HQ-C12” SHA-256 79722cf86cf4a9214f6491ed491a5fa08315097227c3cff944408019d3732da9; SocioLens — Programme Status & Authority Register v0.6 status “CURRENT.”; frozen fixture fixtures/frozen/r07-ld10-claim-ledger-v1.0.
SocioLens — Proof Source Registry v0.4 (v0.4) — Drive ID 1_-GLmj6PfetWDQH2KldMv-61vmSmzdAyyxgZZZCFnbE; revision: NOT_EXPOSED_BY_DRIVE_TEXT_EXPORT; Drive modified 2026-09-27T19:04:00.374Z; block “REGISTRY ENTRY SRC-LD10-AGARWAL-SEN-2026” SHA-256 a8b795d36228989870cb6d32aee2580beafdf759b4c4ee67b04660c0a27bf2e0; SocioLens — Programme Status & Authority Register v0.6 status “CURRENT PROOF SOURCE REGISTRY.”; frozen fixture fixtures/frozen/proof-source-registry-v0.4.

Builder decisions (not Drive data)

VERSION = v1.0 — basis: Claim version taken from the canonical ledger artifact version (R07 — LD-10 Canonical Claim Ledger v1.0); Implementation Architecture Selection §5 logical_id/version convention.
CURRENT_POINTER = true — basis: SocioLens — Programme Status & Authority Register v0.6 status for "R07 — LD-10 Canonical Claim Ledger v1.0 — LOCKED": "CURRENT."
FIELD_6_SOURCE_REFERENCE = SRC-LD10-AGARWAL-SEN-2026--v1.0 — basis: field 6 of ENTRY 12 — LD10-HQ-C12 cites "Agarwal & Sen, SSRN 6513059, revised 8 Jul 2026"; Proof Source Registry v0.4 Q1 materialization rule: use SRC-LD10-AGARWAL-SEN-2026 for the atomic field-6 citation "Agarwal & Sen, SSRN 6513059, revised 8 Jul 2026"; SocioLens record v1.0 is its sole record (the 8 July 2026 date is the external working-paper revision, not a SocioLens record version).
SOURCE_PROVENANCE_PIN = SRC-LD10-AGARWAL-SEN-2026--v1.0 — basis: Issue #5 proof rendering (Architecture Proof Protocol v0.1 AP-08 / Amendment v1.2 §6): explicit version-pinned public provenance of this ClaimVersion — the pinned field-6 Source record.