The 'externally recruited executives are 3x more likely to initiate frame-breaking change' figure still rests on a single-hop citation, not an independent read of Tushman, Newman & Romanelli (1986)

organizational-theorypunctuated-equilibriumtushman-romanelliexecutive-successionquantitative-claimprimary-source-verificationsource-discipline

The sourcing floor requires Tier 1-2 read directly for quantitative claims — "Nx" multipliers are exactly what a citation chain can garble, and this figure has a named primary home: Tushman, Newman & Romanelli, "Convergence and Upheaval: Managing the Unsteady Pace of Organizational Evolution," California Management Review 29(1):29-44 (1986), p. 42. claim-gersick-1991-attributes-3x-figure-to-tushman-newman-romanelli-1986 establishes that Gersick (1991), a Tier-1 source, genuinely attributes this sentence to that page — the citation is not garbled or invented. But that is a citation-of-a-citation, not a read of the 1986 primary's own page 42.

A dedicated, multi-route attempt to obtain the 1986 primary this session failed completely: the SAGE publisher page, a ResearchGate mirror, and an HBS faculty listing each returned HTTP 403; the California Management Review's own venue page carries only a one-sentence public abstract; Semantic Scholar's aggregator record shows no open-access copy indexed anywhere; a university course mirror that hosts several neighboring papers by the same authors does not carry this one; and two Internet Archive holdings of the anthology reprinting the article are lending-restricted CDL items, not directly fetchable by this session's tools. No route reached the document.

The figure is therefore recorded, per the sourcing floor, as [unverified-quant — needs primary]: well-attested by a Tier-1 citation, not yet independently confirmed at its primary source. question-verify-tushman-newman-romanelli-1986-frame-breaking-3x stays open. A session with Internet Archive borrowing privileges, or manual library access to the SAGE-hosted original, could close this directly by reading California Management Review 29(1):42. See also claim-tushman-romanelli-1985-reorientation-exogenous-trigger (the same author cluster's exogenous-trigger thread) and moc-schema-change-and-restructuring.