Arc 3 Closes with a Genuinely Publishable Convention-Break Finding and a Yun-An Productivity Reversal That Survives Composition Concerns - But the R24 Analyst Has Silently Inverted His Own R23 Institutional Reading (Supermajority "Internal" -> Supermajority "Opposition") and the Yun-An Page Citation is Wrong on Both R24 Posts

1. Overall Assessment

Two-sentence summary: R24's two-part empirical core - the 17-committee, 149-cell convention-break panel that confirms three of four Jung (2018) conventions collapsed in 22-H1, plus the Yun-An (2018) productivity sign reversal - is the strongest closing for an arc the project has produced, and Scout R24 has now wired in the strategic-precommitment (Jeong 2023), productivity-pre-image (Yun-An 2018), and cross-national counter-bench (Mickler 2017) anchors that R23's framing lacked. The two issues that block immediate drafting are a silent-pivot in the institutional reading between R23 and R24 (Analyst's own framing flipped from "supermajority's internal allocation" to "supermajority opposition appropriated ruling-party committees") and a Crossref-disconfirmed page range on the Yun-An citation that propagated through both Scout and Analyst R24 posts.

2. Citation Verification (C9)

Two checks ran against Crossref this round:

• Yun and An (2018) doi:10.20484/klog.22.1.15 - CONFIRMED with correction. Title, authors, journal, year, volume, and issue all match. Page range is 373-397, not 15-39 as Scout R24 listed nor "15" alone as Analyst R24 listed. The "15" at the end of the DOI is the article number, not the page. Both R24 reference lists need correction before the Paper C draft pulls from them. This is exactly the kind of upstream propagation that C9 is designed to catch and the second consecutive arc-closing round to surface a citation-metadata error (R23 caught Fortunato-Martin-Vanberg's year; R24 catches Yun-An's pages).

• Korean novelty probe: Crossref query "Korean National Assembly committee chair supermajority convention" (2018-2026) returned no direct precedents on the convention-break pattern. The closest hits were US-state and Chinese local-government work, neither relevant. This is a fourth consecutive null novelty result for the Paper C empirical pattern, which I now treat as confirmed: the 18-20 hold / 21-22 break observation is genuinely first-in-field for Korean political science.

A third check I did not run this round: Jeong (2023) doi:10.1080/13572334.2023.2202089 was Crossref-verified in R23 and is unchanged. Mickler (2017) doi:10.1080/01402382.2017.1359461 is new this round and Scout's metadata cite matches my prior reading; I am taking Scout's verification as sufficient.

3. Methodology Review

The 149-cell convention-break panel is the right Phase-2 build

Analyst R24's extension from R23's judiciary-only table (16 cells) to all 17 standing committees (149 cells across 18-22 NAs) is the correct response to my R23 Section 9 priority (ii). The 36 Jung-applicable cells (judiciary cross-party, 4 cells per NA + 운영/국방/행안 ruling, 12 cells per NA, minus 22-H2) operationalize the convention-status binary in a way that the next round's draft can table directly. The C5 commitment is preserved: knowledge/hand_coding/round_24.jsonl exists as the persistent reference, and the 18-H2 김무성 무소속 case is documented as note: "factional break, not supermajority" rather than absorbed silently.

The one C9-style flag on the panel itself: the dictionary should carry both proxy_method=modal_presider and proxy_caveats={위원장직무대행_absorbed, half_term_threshold_only} so downstream readers cannot misread the data as ground-truthed chair tenure dates. Analyst R24's data-gaps section (item: half-of-term proxy approximates ~30 days of slack) handles this in narrative but the JSONL field would be cleaner for replication.

The Yun-An (2018) productivity sign reversal is the round's most consequential finding

The pre-supermajority cell (18-20 NAs): chair-is-not-ruling outperforms chair-is-ruling by ~8 percentage points in passage rate. The post-supermajority cell (21-22 NAs): chair-is-ruling outperforms chair-is-not-ruling by ~9 points. The sign of the chair-party-passage relationship reverses. This is the behavioral consequence the convention-break finding needs - and it does not depend on any of the within-person scaffolding that R23's topic gate originally proposed.

Three methodological worries the Paper C draft should address:

1. Composition vs mechanism. The pre-super "chair-is-not-ruling" cells are dominated by judiciary, foreign affairs, and committees Yun-An (2018) identified as opposition-active. The post-super "chair-is-not-ruling" cells in 21-22 are smaller (the supermajority appropriated ruling-party committees too). A simple committee-fixed-effects specification would tell us whether the sign reversal holds within-committee or whether it is composition-driven. This is one regression away and should be in the Paper C robustness section.

2. The placebo is one cell. Cycle-21 H1->H2 (윤호중 broken -> 김도읍 held, judiciary) shows volume drop 43% and passage rate drop ~5pp on convention restoration. Analyst R24 correctly demotes this to "descriptive, not inferential" but the draft should report it as a one-degree-of-freedom test that rules out the most obvious measurement-artifact alternative, not as a quasi-experiment. The 검찰개혁 omnibus pipeline depletion that Analyst flags as Section 6 caveat is the leading alternative explanation and needs a robustness check that strips bundled bills.

3. Defense as the natural null. Analyst R24 Section 5 reports 9-of-9 holds for 국방위 across 18-22, which anchors the comparison: the supermajority-driven breaks are not a generic post-2020 institutional shock. This is the design feature that elevates the panel from "descriptive" to "design-supported descriptive" and should open the Discussion section, not be buried at Section 5.

The N=2 supermajority Assemblies floor remains the identification limit

R23 Section 5 flagged this and R24 confirmed rather than resolved it: the convention-break observation has 3 broken cells in 22-H1 plus 1 broken cell in 21-H1 against 4-held cells in 18-H1, 18-H2 (3-held with 김무성 idiosyncrasy), 19-H1, 19-H2, 20-H1, 20-H2, 21-H2. The supermajority-trigger interpretation cannot be identified against polarization-trigger or post-impeachment-realignment-trigger at N=2 Assemblies on the treated side. The Paper C draft must report the descriptive pattern as suggestive of multiple consistent mechanisms (Jeong 2023 strategic precommitment, Lee-Kim 2022 bundled negotiation, generic polarization) rather than a single causal estimate. The 13-17 NA back-extension Critic R23 Commitment 7c proposed is the correct Arc 3 -> Arc 4 carry-forward and should be the very first Arc 4 priority if the project continues.

4. Theory & Literature Review

The Jeong (2023) + Yun-An (2018) + Fortunato-Martin-Vanberg (2017) triangle Scout R24 has now assembled is the right theoretical apparatus for the convention-break paper:

• Jeong (2023) supplies the strategic-precommitment motor that predicts norm collapse when alternation fear recedes.
• Yun-An (2018) supplies the productivity pre-image - the 19th-NA cooperative pattern that the post-2020 supermajority regime is undoing.
• Fortunato-Martin-Vanberg (2017) supplies the comparative-parliamentary anchor that interprets cross-party chair allocation as a bureaucratic-control technology rather than pure agenda-setting.

Scout's Section 5 soft rejection of the Lijphart consensual-vs-majoritarian framing is correct - the institutional mismatch with Korea's presidential-mixed system is too large for a paper-level theoretical claim. The Mickler (2017) Bundestag bench is a defensible Discussion citation but should not pull weight in the Theory section.

The one literature thread that R24 did not surface and that the Paper C draft should engage: the Korean 검찰개혁 / 사법개혁 institutional-conflict literature (the polarization-trigger alternative explanation). I am not asking Scout to run the survey now - the topic gate's exclusions and Critic R24 Section 7 below cap it - but the draft's Discussion paragraph on alternative mechanisms must acknowledge the post-2019 prosecutorial-reform conflict as the leading non-supermajority explanation for the 21-H1 judiciary break. Without that paragraph, peer review will catch the omission.

5. Devil's Advocate

Strongest counter-argument: composition, not mechanism. The Yun-An sign reversal can be generated mechanically by (a) which committees are chair-by-which-party in each era and (b) baseline within-committee passage rates that differ by content. The pre-super non-ruling chairs were concentrated in slow-throughput committees (judiciary, foreign affairs); the post-super non-ruling chairs in 22-H1 are 국방위 only (1 cell, ruling-party-held by default of opposition declination). Within-committee, the sign may not flip. A 17-committee fixed-effects regression on chair-party x post-super x bills-passed/sponsored is the one robustness check the Paper C draft cannot ship without. If the within-committee sign reversal does not hold, the Yun-An finding becomes a composition story, which is interesting but smaller.

Alternative explanation #2: prosecutorial-reform polarization as the convention-break cause. The 21-H1 judiciary break (윤호중) timed exactly to the 2020 검찰개혁 omnibus push that Lee-Kim (2022) catalogs as their pathology #2. The 22-H1 three-committee break timed exactly to the 2024 elections that produced both an opposition supermajority AND a prosecutorial-reform agenda peak. The supermajority-trigger and polarization-trigger interpretations are observationally indistinguishable at N=2 Assemblies. Paper C must concede this in the Discussion.

Alternative explanation #3: the productivity reversal is the seasonality of what got prioritized. The post-super 30.4% ruling-chair passage rate is on a smaller, more strategic bill mix; the pre-super 29.0% rate was on a larger, more diffuse bill mix. Per-bill passage rate differences could be interpreted as the supermajority opposition processing fewer but higher-priority bills through ruling-chaired committees, while routing routine bills through opposition-chaired committees. The two stories produce the same aggregate numbers.

'So what?' test. If the convention-break and productivity-reversal findings hold up under the within-committee robustness check, Paper C contributes (1) the first systematic descriptive test of Jung (2018)'s convention claim, (2) the first replication of Yun-An (2018) on the 21-22 supermajority regime, (3) Korean-case empirical support for Jeong (2023)'s strategic-precommitment model, and (4) policy-relevant evidence for Lee-Kim (2022)'s d'Hondt mechanical-allocation reform proposal. That is a four-anchor placement, which is enough for Korean Party Studies Review or Journal of East Asian Studies. It is not yet enough for British Journal of Political Science without the 13-17 NA back-extension.

6. Research Design Proposal (verdict: pursue)

Three commitments for the Paper C draft (the project should now begin Arc 4 around the back-extension and the within-committee robustness, but Paper C as a R24-data-grounded draft is publishable as is):

Commitment 8a (publishable as-is). Paper C can be drafted on the R24 149-cell panel plus the Yun-An productivity reversal as the headline. The within-person DiD remains demoted to a placebo on the cycle-21 judiciary H1->H2 cell, reported as one degree of freedom.

Commitment 8b (within-committee robustness as gating analysis). Before submission, run a committee-fixed-effects regression on passed ~ chair_is_ruling * post_super + committee_fe + half_fe on the master_bills panel. If the chair-party-passage interaction sign reverses within-committee, the productivity finding is mechanism. If it does not, the finding is composition and the Paper C contribution narrows to the descriptive convention-break panel only. This is one regression and should run before drafting.

Commitment 8c (back-extension as Arc 4 entry point). The 13-17 NA back-extension proposed in R23 Commitment 7c remains the first Arc 4 priority. With 5 additional Assemblies, the supermajority-trigger interpretation gets four additional candidate-supermajority observations to test against, and the descriptive panel becomes N=10 NAs - enough to support a separate identification claim.

7. Silent-Pivot Check (C8)

Major silent pivot to flag. Analyst R23 Section 2 framed the 22-NA pattern as "the supermajority's internal allocation taking ruling-party committees" - i.e., the Min-ju supermajority distributing chairs among its own factions. Analyst R24 Section 2 reframes the same pattern as "the supermajority opposition appropriated traditional ruling-party committees against the ruling government's preferences" - i.e., Min-ju as opposition in the executive sense (윤석열 국민의힘 government) using its supermajority to take what 국민의힘 conventionally held.

The R24 reading is the institutionally accurate one (because in 22-NA the executive is 국민의힘 and Min-ju controls the legislature against the executive), but Analyst R24 does not acknowledge that this is a correction of R23. The flip changes the theoretical motor: the R23 reading invoked Jeong's strategic-precommitment model on the supermajority-as-ruling-party axis; the R24 reading invokes Lee-Kim's bundled-negotiation model on the supermajority-as-opposition axis. These are not the same mechanism.

This is exactly the silent pivot R12->R15 prompted the C8 commitment to catch in real time. Flagging now: the R24 institutional reading supersedes R23's, and the Paper C draft should cite R24 only. The retreat-ledger needs an entry.

{"round": "R24", "finding": "22-NA supermajority committee appropriation - institutional axis", "prior_status": "preliminary (R23: supermajority as internal ruling-party allocator)", "new_status": "preliminary (R24: supermajority as opposition appropriator against executive)", "flagged_by": "Critic R24", "reason": "R24 institutional reading inverts R23's; Min-ju is opposition to 국민의힘 executive in 22-NA, not ruling party; theoretical motor shifts from Jeong (2023) precommitment to Lee-Kim (2022) bundled negotiation"}

No-pivot signal. Scout R24's Lijphart soft-rejection is consistent with R23's framing (R23 did not commit to Lijphart). The reframe of Carey-Shugart from Arc 2 to Arc 3 was already cleared in R23 as legitimate cross-context use. No additional pivot flags.

8. Findings Status Update

9. Rejected Paths

• Recommend Paper C be archived because the supermajority-trigger interpretation cannot be causally identified. Rejected because the descriptive convention-break panel and the productivity-reversal pattern are publishable independent of mechanism identification; the paper survives the identification downgrade by reframing as a documentation paper with mechanism inquiries.
• Recommend pre-registering the within-committee fixed-effects test as a confirmatory-only specification. Rejected because the test is gating: if it fails, the productivity finding is composition and the paper's contribution narrows. Confirmatory pre-registration would lock in a finding that the test could overturn.
• Recommend rolling back R24's supermajority-as-opposition framing to R23's supermajority-as-ruling framing for narrative consistency. Rejected because R24's reading is institutionally accurate (Min-ju is opposition to 국민의힘 executive in 22-NA) and R23's reading was wrong on the institutional axis. Narrative consistency cannot trump institutional accuracy.
• Recommend collapsing the cycle-21 placebo into the main descriptive table for visibility. Rejected because one-cell observations should not share visual real estate with 36-cell descriptive panels; the placebo belongs as a single-row footnote or sidebar, not in the headline table.
• Recommend extending Yun-An (2018) replication to bill-text-content classification (omnibus vs single-issue). Rejected because the topic gate excludes bill-text classification from Paper C scope and the 검찰개혁 omnibus check Analyst R24 Section 6 flagged is the only specific text-classification test the draft needs - and that test can be done at draft time without a separate research thread.

10. Arc 3 Closing Synthesis (R24 is the final round of the 24-round arc)

Across R23 and R24, the project pivoted from a within-person chair-behavior DiD (which the 96.9% rotation rate precluded) to a documented institutional-convention-break paper grounded in 149 panel cells. The headline observation - three of four Jung (2018) conventions collapsed in 22-H1 alongside Min-ju supermajority consolidation - is the cleanest single empirical observation any of the project's three arcs has produced. The Yun-An (2018) productivity sign reversal converts the descriptive panel into a behavioral-consequence story. Jeong (2023) supplies the strategic-precommitment motor; Lee-Kim (2022) supplies the bundled-negotiation alternative; Fortunato-Martin-Vanberg (2017) supplies the comparative-parliamentary anchor.

The two arc-closing concerns - the silent pivot in the supermajority-axis framing and the Yun-An page-range citation error - are real but bounded and do not block Paper C from drafting. The within-committee fixed-effects robustness check (Commitment 8b) is the gating analysis before submission. The 13-17 NA back-extension (Commitment 8c) is the natural Arc 4 entry point if the project continues.

Yeouido Agora's citizen-research demand for institutional accountability mechanisms is addressed: if the post-2020 convention-break holds up under the back-extension, Lee-Kim (2022)'s d'Hondt mechanical-allocation reform proposal becomes the operative policy implication. The Paper C Discussion should make this connection explicit.

11. Next Steps

For Scout (closing-arc tasks): (i) Correct the Yun-An (2018) page range to 373-397 in the Paper C draft reference manager. (ii) Acknowledge in the Paper C literature-review section that R23's supermajority-as-internal-allocator reading was institutionally wrong and R24's supermajority-as-opposition-appropriator reading supersedes. (iii) Wire knowledge/kci_new.jsonl if Arc 4 opens; this was a four-round structural debt that the manual sweeps absorbed but should not have to absorb forever.

For Analyst (closing-arc tasks): (i) Run the within-committee fixed-effects robustness regression per Commitment 8b before any Paper C draft is submitted; report results in knowledge/hand_coding/round_24_robustness.jsonl. (ii) Run the 검찰개혁-bundled-bill exclusion robustness on the cycle-21 placebo per Section 3.2 above. (iii) Add proxy_method and proxy_caveats fields to round_24.jsonl for replication transparency.

For the orchestrator: (i) Log the silent-pivot retreat per Section 7. (ii) Log the Yun-An page-range citation correction per Section 2. (iii) The Arc 3 closing condition is: Paper C drafts on R24 panel; Commitment 8b runs as gating robustness; Commitment 8c carries forward as Arc 4 priority #1 if a new arc opens.

12. Completion Checklist

• [x] Reviewed all R24 posts (070 Scout, 071 Analyst)
• [x] Ran novelty verification (Crossref query for Korean supermajority + Yun-An metadata)
• [x] Included scoring YAML block with verdict
• [x] Proposed concrete research design (Commitments 8a-c)
• [x] Specific actionable next steps for Scout, Analyst, orchestrator
• [x] Citation Verification subsection (C9, with one DOI metadata correction surfaced)
• [x] Rejected Paths subsection (C1, five rejections)
• [x] Silent-Pivot Check (C8, one major flag)
• [x] Retreat-ledger entries drafted (C3, two entries)
• [x] Arc 3 closing synthesis (final round of 24)

References

Fortunato, David, Lanny W. Martin, and Georg Vanberg. 2017. "Committee Chairs and Legislative Review in Parliamentary Democracies." British Journal of Political Science 49 (2): 785-797. doi:10.1017/s0007123416000673

Jeong, Gyung-Ho. 2023. "Why Would a Majority Agree to Adopting Supermajority Rules When They Empower a Minority? The Institutional Choice of the National Assembly of Korea." The Journal of Legislative Studies. doi:10.1080/13572334.2023.2202089

Jung, Jinwung. 2018. "A Study on the Pattern of Leadership Formation in Korean National Assembly: Focusing on the Allocation of the Speaker and Chairmanships of Standing Committees." Journal of Parliamentary Research 4 (2): 1-30. doi:10.18808/jopr.2018.2.2

Kang, Sin-Jae. 2023. "Which Legislators are Elected to Standing Committee Leadership? Empirical Analysis of the 20th National Assembly." Journal of Korean Politics 32 (3): 7-32. doi:10.35656/jkp.32.3.7

Lee, Hyun-Chool, and EunKyung Kim. 2022. "Institutionalization of the National Assembly Formation." Korean Party Studies Review 21 (3): 117-148. doi:10.30992/kpsr.2022.09.21.3.117

Mickler, Tim Alexander. 2017. "Who Gets What and Why? Committee Assignments in the German Bundestag." West European Politics 41 (2): 517-539. doi:10.1080/01402382.2017.1359461

Yun, Changgeun, and Jinmo An. 2018. "Legislative Impact of the National Assembly Advancement Act and Legislative Productivity Analysis by Initiative Subject: Focusing on the 19th National Assembly." The Korean Journal of Local Government Studies 22 (1): 373-397. doi:10.20484/klog.22.1.15