Halbwachs's 1925 collective-memory theory is the shared ancestor of Portelli's and Foroughi & Al-Amoudi's interpretive "forgetting," with no lineage into Argote/Benkard's econometric model

Maurice Halbwachs's Les cadres sociaux de la mémoire (1925) argued that individual memory is reconstructed in the present through social frameworks — memory is never a private, isolated recording. That thesis is the explicit cited framework behind Foroughi & Al-Amoudi's account of interpretive organizational forgetting, and it is the intellectual lineage oral history's collective-memory tradition — Portelli's own field — descends from. It has no such lineage into Argote and Benkard's econometric forgetting, which descends instead from production-function economics and Wright's-law-style learning curves. One "forgetting" is about meaning surviving factual drift; the other is about a depreciation parameter (δ) decaying. Which branch a given use of "organizational forgetting" belongs to is therefore a question about intellectual ancestry, not a single graded property of one phenomenon.

[unverified-mechanism] Halbwachs's direct citation lineage into Portelli specifically — as opposed to Portelli belonging to the general collective-memory field Halbwachs founded, without a traceable direct citation — is not confirmed from primary text. Foroughi & Al-Amoudi's own direct citation of Halbwachs is reported secondhand (see the companion note's quote-provenance flag) rather than confirmed against their paper's actual reference list. Verification routed to question-verify-halbwachs-direct-lineage-into-portelli.