Series 2 · Antitrust

The Merger Market With Missing Imports

Q54Four modelsSix blind pairingsMaterial-outcome scoring

Why this result mattered

Functional tie

The principal comparison placed Qwen 3.8 and Claude under concealed A/B labels.

Both answers put counsel on the same materially safe path: no yarn-market filing trigger, immediate verification of mesh imports and seller-level revenues, filing before closing if either mesh threshold is met or remains indeterminate, and no closing or premature integration without compliance. Their different preferred filing timing produces no concrete, record-supported difference in cost, delay, exposure, or transaction outcome.

Benchmark materials

Prompt and sealed key

The key is an audit reference. It was not shown to the contestant systems and did not determine the comparative verdict.

Read the original matter prompt

Question 54: The Merger Market With Missing Imports

Your role

You represent Alder Loom, which proposes to acquire rival Prism Thread for $140 million in the fictional Federation of Corda. Management needs a merger-screen calculation and a filing recommendation. One product market is complete; the other depends on import revenue not yet verified.

Governing law

Assume the following Corda rules apply:

  1. A premerger filing is required for a transaction above $100 million when, in any properly defined market, either: (a) the parties' combined share is at least 25 percent; or (b) postmerger HHI exceeds 1,800 and the merger increases HHI by more than 200 points.

  2. HHI is the sum of squared market shares. Combining firms increases HHI by twice the product of their premerger shares.

  3. Revenue from products delivered into the market counts regardless of seller location. Claimed imports are included only to the extent verified as sales into the relevant market during the measurement year.

  4. A postmerger HHI above 1,800 with an increase greater than 200 creates a structural presumption of competitive harm. Other screens do not create that presumption but may still require investigation.

  5. Product-market definition turns on customer substitution under the supplied facts. Counsel must not combine distinct products merely to dilute share.

  6. Parties must file before closing when a threshold is met. Closing without a required filing exposes each party to $40,000 per day from closing until compliance.

  7. When a known, obtainable market input determines filing, counsel must obtain it or recommend filing conservatively. It may not assume the input in the direction preferred by the client.

  8. A filing does not concede illegality. The parties may present entry, expansion, efficiencies, failing-firm, or remedy evidence after filing when supported.

Facts

Alder Loom and Prism Thread make two products: industrial conductive yarn and medical conductive mesh. Customers do not substitute one for the other, so they are separate markets.

Industrial conductive yarn

Premerger shares are:

  • Alder Loom: 12 percent.
  • Prism Thread: 8 percent.
  • Competitor A: 25 percent.
  • Competitor B: 20 percent.
  • Competitor C: 15 percent.
  • Competitor D: 10 percent.
  • Competitor E: 10 percent.

The shares sum to 100 percent.

Medical conductive mesh

Verified domestic-market revenue totals $80 million and includes:

  • Alder Loom: $18 million.
  • Prism Thread: $6 million.
  • Other verified sellers combined: $56 million.

Industry participants report additional imported mesh, but the supplied record does not establish how much was actually delivered into Corda during the measurement year. Customs codes combine medical mesh with unrelated textile products. A specialist can verify qualifying import revenue within ten days from customer and importer records. The plausible but unverified range is $0 to $30 million.

Assume Alder and Prism's $24 million combined medical-mesh revenue is complete. If qualifying imports exist, add them to the $80 million market denominator. No verified seller-by-seller import shares are available, so a reliable medical-mesh HHI cannot yet be calculated.

The parties want to sign next week and close in 35 days. Management argues no filing is needed because "imports probably push us below 25 percent."

Assignment

Analyze:

  • Combined share, premerger HHI, postmerger HHI, and HHI increase for industrial conductive yarn.
  • Whether either filing trigger or structural presumption applies in that market.
  • The medical-mesh combined-share formula using qualifying import revenue.
  • The exact import-revenue level at which the combined share falls below 25 percent.
  • Why medical-mesh HHI cannot yet be calculated reliably.
  • The specific data needed to verify imports.
  • Filing and gun-jumping consequences.
  • Whether to file now, wait for the ten-day data work, or proceed without filing, with a concrete recommendation conditioned on the missing market figure.


Read the sealed key

Q54 key (Merger Market With Missing Imports)

  1. Industrial-yarn combined share is 20 percent. Premerger HHI is 12 squared + 8 squared + 25 squared + 20 squared + 15 squared + 10 squared + 10 squared = 1,658. Increase is 2 x 12 x 8 = 192; postmerger HHI is 1,850. Missed: the complete market screen is wrong.
  2. Neither filing trigger applies in yarn: combined share is below 25 percent and HHI increase is not greater than 200. Post-HHI exceeds 1,800 but the delta fails the conjunctive trigger and presumption. Missed: one threshold component is treated as sufficient.
  3. Medical-mesh combined share is $24 million divided by $80 million plus verified qualifying imports I. The share is at least 25 percent when 24/(80 + I) is at least 0.25. Solving gives I at or below $16 million. It falls below 25 percent only when imports exceed $16 million. Missed: management's vague import claim replaces the dispositive calculation.
  4. Medical HHI cannot be computed because seller-by-seller import shares are absent. Total import revenue alone will not supply squared shares. Missed: a fabricated HHI is used for filing.
  5. Obtain verified customer purchases, importer sales, product classifications, delivery destinations, and seller-level revenues within ten days. The customs category alone is insufficient. Missed: unrelated textiles dilute the market.
  6. The filing call depends on the missing imports unless another reliable trigger emerges. Wait the ten days before closing, not before signing, and file if qualifying imports are $16 million or less or if uncertainty remains too great to establish below-threshold status. Missed: parties close on "probably" and incur $80,000 per day combined exposure.
  7. Filing preserves legality without conceding competitive harm. Do not proceed to close without either verified data defeating both triggers or a filing and clearance. Missed: timing preference becomes gun jumping.
Blind evaluation record

Direct judge report

The report below is preserved from the Qwen 3.8 versus Claude verdict record.

Read the preserved judge report
TIE, FUNCTIONALLY EQUIVALENT.

Basis. Both answers put counsel on the same materially safe path: no yarn-market filing trigger, immediate verification of mesh imports and seller-level revenues, filing before closing if either mesh threshold is met or remains indeterminate, and no closing or premature integration without compliance. Their different preferred filing timing produces no concrete, record-supported difference in cost, delay, exposure, or transaction outcome.

[A] rejected: “$2.4 million per party per month” and “thirty days ... 3.4% of the purchase price” — record’s $40,000 daily rate equals $1.2 million per party and $2.4 million combined over thirty days.
[A] rejected: filing is “cheap” — record lacks filing-cost or waiting-period data.
[A] rejected: treating approximately $16–18 million as indeterminate — record lacks a measurement-error estimate supporting that band.

Failed candidate: File now versus verify for ten days while preparing the filing — concrete consequence failed; the record establishes no material cost, delay, or lost protection from either safe course.
Failed candidate: Incorrect penalty arithmetic in A — different conduct failed; the stated daily rate and core warning remain correct and are ordinarily verifiable.
Failed candidate: A’s extra $16–18 million caution band — concrete consequence failed; no material effect of an unnecessary filing is established.
Failed candidate: A’s recommendation to re-audit yarn shares — concrete consequence failed; the supplied shares are fixed and no outcome-changing error is supported.
Failed candidate: Different gun-jumping formulations — different conduct failed; both require continued independence and controls against premature coordination.
Failed candidate: Different levels of HHI and import-verification detail — different conduct failed; both require the same seller-level data and apply the same thresholds.

Hard stop. It cannot be completed with a concrete, record-supported consequence.
Complete comparison record

All six pairings

Every pair of the four model answers was judged independently under the same evaluation instrument.

Open the six head-to-head results
PairingResultWhy it matteredRecord
Qwen 3.8 27B vs Claude Opus 5Functional tieBoth answers put counsel on the same materially safe path: no yarn-market filing trigger, immediate verification of mesh imports and seller-level revenues, filing before closing if either mesh threshold is met or remains indeterminate, and no closing or premature integration without compliance.Judge record
Qwen 3.8 27B vs DeepSeek V4-Flash-0731Functional tieBoth answers correctly clear the industrial-yarn market, identify verified medical-mesh imports above $16 million as necessary to defeat the share trigger, and require seller-level data to resolve any remaining HHI issue.Judge record
Qwen 3.8 27B vs Qwen 3.5 27BQwen 3.8 winAnswer A permits proceeding without filing when verified imports exceed $16 million even though, for imports between $16 million and approximately $23.923 million, the HHI increase exceeds 200 and postmerger HHI remains unresolved.Judge record
DeepSeek V4-Flash-0731 vs Claude Opus 5Functional tieBoth answers correctly conclude that yarn creates neither a filing trigger nor a structural presumption, while mesh requires verified imports exceeding $16 million to defeat the share trigger and seller-level data to assess HHI.Judge record
DeepSeek V4-Flash-0731 vs Qwen 3.5 27BDeepSeek winAnswer B permits proceeding without filing whenever verified imports exceed $16 million even though the unresolved medical-mesh HHI may independently trigger filing. Answer A instead requires seller-level verification or conservative filing, preventing an unfiled closing and the resulting $40,000-per-party…Judge record
Qwen 3.5 27B vs Claude Opus 5Claude winAnswer B permits proceeding without filing whenever verified imports exceed $16 million, despite leaving the HHI trigger unresolved. Answer A correctly identifies the approximately $16–$23.9 million band in which the share trigger fails but the HHI increase exceeds 200, requiring seller-level HHI analysis…Judge record
Rejected-point diagnostic

Judge-attributed rejected points for this matter across all six pairings:

Qwen 3.8 27B3
DeepSeek V4-Flash-07312
Claude Opus 54
Qwen 3.5 27B4

This is a review-burden diagnostic, not a universal hallucination measure.

Available reasoning traces