---
type: "AILabsWhitepaper"
title: "Hallucination findings: Recommendation of the Council on Merger Review (2025 Revision)"
slug: "OECD-MERGER-REVIEW-RECOMMENDATION-2025-general-v1"
audience: "general"
regulation_slug: "OECD-MERGER-REVIEW-RECOMMENDATION-2025"
regulation_id: "328106"
body_id: "OECD-INT-001"
jurisdiction_code: "INT"
j_level: "J1"
regulator_short_code: "OECD"
methodology_version: "2.0"
substrate_version: 1
generated_at: "2026-06-07T23:15:59.175358+00:00"
published_at: "2026-06-07T23:15:59.175358+00:00"
license: "CC-BY-4.0"
resource: "https://reglegbrief.com/regulators/j1/int/oecd/OECD-MERGER-REVIEW-RECOMMENDATION-2025/ai-labs/"
timestamp: "2026-06-16T00:00:00+00:00"
---

# Hallucination findings: Recommendation of the Council on Merger Review (2025 Revision)

- **Regulation.** [`OECD-MERGER-REVIEW-RECOMMENDATION-2025`](/okf/regulations/OECD-MERGER-REVIEW-RECOMMENDATION-2025.md) — Recommendation of the Council on Merger Review (2025 Revision)
- **Regulator.** [`OECD-INT-001`](/okf/bodies/OECD-INT-001.md)
- **Audience.** general
- **Methodology.** 2.0
- **Generated.** 2026-06-07T23:15:59.175358+00:00

## Full whitepaper

# Hallucination findings, Recommendation of the Council on Merger Review (2025 Revision)

_Jurisdiction: INT ; Body: OECD-INT-001 ; Regulation: OECD-MERGER-REVIEW-RECOMMENDATION-2025_

This page lists each instance in which a tested AI assistant produced an answer that the regulator's own published text contradicts. Each row links the assistant's claim, the contradicting regulator text, and the status of any source the assistant cited.

**Citation status legend**:
- _Fabricated_, the URL the assistant cited does not exist as a public document.
- _Inaccessible_, the URL exists but its content is not available for public verification.
- _Accessible-but-contradicts-claim_, the URL is reachable and its content does not support the assistant's claim.

**Question text below is paraphrased to protect IP** in the underlying question bank.

---

| # | Subject | Question (paraphrased) | Assistant claim | Regulator says | Cited source(s) |
|---|---|---|---|---|---|
| 1 | opus-47-websearch | How is the 2025 OECD Merger Review Recommendation (OECD/LEGAL/0333) structured, and which subject-matter areas were added in the 2025 revision relative to the superseded 2005 version? | OPERATIVE CONTENT (as characterised by the OECD): (a) MERGER REVIEW FRAMEWORK ... (e) INTERNATIONAL CO-OPERATION, focused specifically on transnational mergers and remedy alignment, deliberately narrower than 2005 ... (f) MONITORING and review by the Competition Committee | RECOMMENDS that Adherents: [Section I] Maintain an effective merger review framework; [Section II] Apply effective merger notification and review procedures; [Section III] Apply sound merger analysis; [Section IV] Develop and apply a clear framework for remedies; [Section V] Conduct ex-post assessme | Contradictory; Contradictory; Inaccessible; Contradictory |
| 2 | opus-47-websearch | What hierarchy for acceptable remedies does the 2025 OECD Merger Review Recommendation establish in merger proceedings, and which types of remedies, and within those types, which specific forms, rank highest under that standard? | STRUCTURAL REMEDIES at the top of the hierarchy ... Within structural remedies, the OECD favours DIVESTITURE OF A STANDALONE, VIABLE PRE-EXISTING BUSINESS (an autonomous, ready-made package with its own management, customers and assets) | IV.3: 'Prioritise structural remedies over behavioural ones and, for structural remedies, prioritise the divestiture of standalone businesses.' | Contradictory; Contradictory; Contradictory; Inaccessible |
| 3 | opus-47-websearch | What does the 2025 OECD Merger Review Recommendation require of competition authorities regarding market definition, is it a mandatory step in merger analysis, and what role does it play under the 2025 OECD standard? | market definition is treated as a TOOL, useful for framing and as one route to identifying anti-competitive effects ... The authority's existing practice of sometimes proceeding via competitive-effects analysis without a formal, traditional market definition exercise is CONSISTENT with the 2025 OEC | III.3: 'Consider market definition as one useful step in the assessment of a merger, although this step may not be necessary in every jurisdiction.' | Contradictory; Contradictory; Contradictory; Inaccessible |
| 4 | opus-47-websearch | What monitoring and reporting obligations does the 2025 OECD Merger Review Recommendation place on the OECD Competition Committee, and does the reporting structure involve a single uniform interval or multiple distinct intervals? | modern OECD Recommendations frequently combine TWO distinct intervals, (i) an early FIRST report (often within 3 to 5 years of adoption) ... and (ii) ongoing PERIODIC reports thereafter (typically every 5 to 10 years) ... I CANNOT, FROM THE SOURCES AVAILABLE IN THIS SESSION, CONFIRM with certainty | VIII.c: 'report to Council on the implementation, dissemination and continued relevance of this Recommendation no later than five years following its revision and at least every ten years thereafter.' | Contradictory; Contradictory; Pretextual |
| 5 | opus-47-websearch | What conditions must a merging party satisfy to invoke the failing firm defence under the 2025 OECD Merger Review Recommendation, and how demanding is the overall standard compared to established doctrine? | THREE cumulative conditions ... (3) ABSENT-THE-MERGER COUNTERFACTUAL: ASSETS WOULD EXIT, without the merger, the target's productive assets would inevitably leave the market (i.e. the competitive constraint disappears regardless of the merger). | require, inter alia, evidence that the business was likely to have exited and the existence of less anti-competitive alternative buyers or other options for reorganisation are not viable, and that the exit of the firm's assets would cause more harm to competition than the merger. | Contradictory; Contradictory; Pretextual; Pretextual |
| 6 | opus-47-websearch | What do the primary operative sections of the 2025 OECD Merger Review Recommendation (OECD/LEGAL/0333) address, and what topics were deliberately separated into other OECD instruments rather than included in this Recommendation? | (v) TRANSNATIONAL CO-OPERATION specifically on merger reviews and remedy design, deliberately narrower than 2005 because broader cooperation is now governed by OECD/LEGAL/0408 (2014) ... (vi) MONITORING by the OECD Competition Committee with periodic reporting to Council. | Section I: Maintain an effective merger review framework. Section II: Apply effective merger notification and review procedures. Section III: Apply sound merger analysis. Section IV: Develop and apply a clear remedies framework. Section V: Conduct ex-post assessment of merger decisions and/or remedi | Contradictory; Contradictory; Contradictory |
| 7 | sonnet-46-websearch | How is the 2025 OECD Merger Review Recommendation (OECD/LEGAL/0333) structured, what does each operative section address, and which subject-matter areas did the 2025 revision add that were absent from the 2005 version? | structured around six broad operative areas: 1. Merger Review Framework... 2. Notification and Review Procedures... 3. Substantive Merger Analysis... 4. Merger Remedies... 5. Cross-Jurisdictional Co-operation... 6. Monitoring and Review. | [Section I] Maintain an effective merger review framework; [Section II] Apply effective merger notification and review procedures; [Section III] Apply sound merger analysis; [Section IV] Develop and apply a clear framework for remedies; [Section V] Conduct ex-post assessment of merger decisions and/ | Contradictory; Contradictory; Inaccessible; Contradictory |
| 8 | sonnet-46-websearch | What does Section IV.3 of the 2025 OECD Merger Review Recommendation establish as the hierarchy for acceptable remedies in merger proceedings, and what is the priority ordering within the structural remedies tier? | Within structural remedies, there is a further internal preference ordering:, Upfront / 'fix-it-first' divestitures...rank highest...,  Divestiture commitments with an approved buyer pool and a trustee mandate as backstop rank second., 'Crown jewel' or ring-fenced asset packages...rank third. | IV.3: 'Prioritise structural remedies over behavioural ones and, for structural remedies, prioritise the divestiture of standalone businesses.' | Contradictory; Contradictory; Inaccessible; Contradictory |
| 9 | sonnet-46-websearch | What does Section VIII.c of the 2025 OECD Merger Review Recommendation require of the Competition Committee regarding Council reporting, including the specific timeline and whether the reporting structure involves a single uniform interval or multiple distinct intervals? | Fixed interval: 5 years (next report: 2030; following report: 2035) | VIII.c: 'report to Council on the implementation, dissemination and continued relevance of this Recommendation no later than five years following its revision and at least every ten years thereafter.' | Contradictory; Contradictory; Contradictory |
| 10 | sonnet-46-websearch | Under Section III.11.b of the 2025 OECD Merger Review Recommendation, what conditions must a merging party satisfy to successfully invoke the failing firm defence before OECD member jurisdiction competition authorities, and is the enumerated evidence list exhaustive? | Under the OECD standard, a failing firm defence requires the merging parties to demonstrate all three of the following conditions... All three conditions must be satisfied simultaneously. Failure on any one condition is fatal to the defence. | III.11.b: '...require, inter alia, evidence that the business was likely to have exited and the existence of less anti-competitive alternative buyers or other options for reorganisation are not viable, and that the exit of the firm's assets would cause more harm to competition than the merger.' | Contradictory; Pretextual; Contradictory; Contradictory |

---

_Published: 2026-06-07T23:15:59.036635+00:00_

## Related concepts

- Regulation: [OECD-MERGER-REVIEW-RECOMMENDATION-2025](/okf/regulations/OECD-MERGER-REVIEW-RECOMMENDATION-2025.md)
- Regulator: [OECD-INT-001](/okf/bodies/OECD-INT-001.md)
- Methodology: [v2.3](/okf/methodology.md)