Markowitz in the open fields

Status: Prior

Status is derived only from the shepherd-authored triage/prediction data above -- community submissions and claims are a separate overlay and can never change it (see the participation panel below).

This is a proposed connection between two domains, generated by a language model. It is not an article and not evidence: it sits below the evidence/publication boundary. A quantitative prediction and a named kill-dataset are attached (when registered) so the claim stays falsifiable rather than merely evocative.

Claim (verbatim)

Markowitz in the open fields. Medieval strip scattering tracks the local yield covariance matrix (recoverable from modern soil data): more scattering where covariance is low across micro-zones, early consolidation where it's high. Falsify: field-system GIS vs soil covariance.

Kill-dataset (verbatim)

field-system GIS vs soil covariance.

Provenance

Run: Imported conversation (verbatim harvest) · model: claude-fable-5

Origin: operator conversation with Claude Fable 5 at max effort, conducted 2026-07-03, relayed verbatim by the operator into the shepherd session on 2026-07-04. No ModelRun exists for the original generation (it happened outside the pipeline); this transcript file is the canonical capture. Transcript path: docs/generated/conjecture_harvest_fablemax_20260703.md. Model (operator-attested, not pipeline-recorded): claude-fable-5. Novelty disclaimer (verbatim, load-bearing -- rule 4): "Same caveat as before, doubled: at 100 items across all of archaeology and history, some of these will have cousins in the literature I can't check. What I can guarantee is the format — each links two things not normally linked, and each names the dataset or measurement that would kill it."

Novelty / leakage triage

Leaked (already exists in the literature)

Substantially published and famously so: McCloskey explicitly models open-field strip scattering in portfolio/variance-reduction terms with a measured (~10%) yield penalty, and a whole subsequent literature tests and critiques the risk-insurance explanation (pooling/storage alternatives, cost arguments). The harvest's refinement — operationalizing against a modern soil-covariance GIS matched to field maps — was not located, but the connection is a classic of the field.

McCloskey, 'The open fields of England: rent, risk, and the rate of interest' — The portfolio model of scattering
'Scattering as insurance: A robust explanation of open fields?' — The critical literature

Predictions

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