Qualification: The One-Man Show: The Effect of Joint Decision-Making on Investor Overconfidence

Record: kaal:position:2026-08-08-325 · 2026-08-08

Piehlmaier qualifies Kaal's prediction that deliberation should reduce over-approval. His preregistered experiments distinguish reflective exchange from validation. Joint financial decision-making reduced overconfidence when the interaction made unknown aspects of the decision salient. A simple stamp of approval without reflection did not provide the same corrective mechanism. This supports a narrower causal rationale. An exchange can expose missing information before a decision hardens. The study does not examine agentic validator pools, submission approval, reputation-bearing incentives, profit from approval, or Kaal's registered cohort. It measures investor overconfidence in controlled financial-decision settings. The predicted effect on false approvals therefore remains unverified until the registered study tests it directly.

Affirmed commentary position. This record extends a source-bound scholarly claim but is not a verbatim paper claim.

Holds when

The response is limited to the exact joint-decision and metaknowledge passages and the one mapped Kaal claim.
External evidence level: complete official open-access Oxford Academic article HTML bound through DOI, title, author, Crossref, OpenAlex, Semantic Scholar, full-text hash, and section-level exact evidence locators.
Mapping review tier: independent substantive scholarly-growth qualification.
The source studies investor overconfidence, not submission approval or false approvals.
The source does not examine agentic validators, review pools, reputation, or approval-contingent profit.
The experiments do not test Kaal's registered cohort, implementation, measures, or outcomes.
The source supports only the narrower information-exposure mechanism. It does not establish that deliberation will reduce over-approval.
Five inherited Semantic Scholar identity refreshes returned HTTP 429. Those candidates remained metadata-only and were withheld.

Current debate

The One-Man Show: The Effect of Joint Decision-Making on Investor Overconfidence

Scholarly basis

kaal:claim:7261018-028
Wulf A. Kaal, Empirical Evaluation of the Agentic Reputation Substrate: Deliberation, the Composition of Error, and the Registered Measurement of Agency Costs in a Controlled Multi-Model Cohort (2026). SSRN: https://ssrn.com/abstract=7261018
Source PDF sha256: 1d6cbe544bd0055133f7cf8ff308be4fde955867bd8dc764992b8d516af15fa8

Evidence and mapping

Evidence: complete official open-access Oxford Academic article HTML bound through DOI, title, author, Crossref, OpenAlex, Semantic Scholar, full-text hash, and section-level exact evidence locators
Review tier: independent substantive scholarly-growth qualification
Mapping confidence: 0.95
Mapping ambiguous: false

Topics

consensus-and-security risk-and-incentives scholarly-growth-coverage scholarly-literature deliberation decision-making overconfidence financial-decisions

Provenance

Affirmed in kaal-review:2026-08-12:scholarly-growth-7261018-028-reviewed-v1 on 2026-08-08. Review record.

Verify

Canonical markdown sha256: f5407a3011f32dee7cd6ca2295692b7c74bc6b12425e21e13528398409104127
curl -s https://wulfkaal.github.io/positions/2026-08-08-325.md | sha256sum