← All conjectures · Book economics & scribal labour
The thousand-year price of a plain book
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).
“Anticipated in print” means the direction of this claim already appears in scholarship, while this exact test has never been run — it records prior art, not proof; nothing here counts as supported or falsified until a registered resolution says so.
Claim (verbatim)
Everyone knows books were expensive before print and cheap after; the standard picture adds a slow medieval cheapening in between. Join the ancient and medieval price records instead into one series and the conjecture is starker: measured in unskilled day-wages, a plain working copy of a standard-length text cost roughly the same in Roman Egypt as in fifteenth-century Italy — a flat real price across more than a millennium, three scripts, and three writing materials. The mechanism is that labour dominated the cost of any book and the human hand's copying speed was a biological constant no organizational change could move, so no pre-print economy could push the real price down. If the conjecture holds, the entire pre-print era becomes a single price regime, and every story of gradual cheapening before Gutenberg breaks.
Prediction clause (verbatim)
Primary clause (carries the verdict): the price of a plain, undecorated copy of roughly 200 leaves' worth of text falls within a single 30-100 unskilled-day-wage band in every region-century cell with usable data, from Roman Egypt to 15th-century Europe, with no statistically significant monotonic downward trend across the pre-print cells. Secondary clause: within-century variance across places exceeds the variance of century means, i.e. geography mattered more than progress.
Kill-dataset (verbatim)
papyri.info (in-house) for ancient book prices and wages; SfarData fee-bearing colophons; SDBM sale prices with published wage deflators; the kill is a statistical trend test across the assembled cross-era series.
In the kill-dataset registry:
Nobody has run this test. The kill-data is named above. If you can run it — or you know the paper that already settles it — claim the kill or submit the prior scholarship. Kills and prior scholarship are credited here, by name, as they come in.
How this item is catalogued
Catalogue tags are curatorial metadata that make the conjecture findable. They are not findings, not a novelty verdict, and naming a source family is not a promise that the data exist or are accessible. Each dimension below says whether it was assigned, reviewed with none applying, uncertain, or not yet reviewed, and who recorded it.
- Place & era tags — Assigned
- Egypt; Rome & Italy; Cross-period Tagged by claude-sonnet-5 + claude-fable-5 (gate)
- Dating — Phenomenon
- Dated c. 100 BCE – 1500 CE Union of compared price series: papyri.info Roman-Egyptian book prices/wages through SDBM/SfarData fifteenth-century Italian and Iberian book prices. Tagged by claude-sonnet-5 + claude-fable-5 (gate)
- Subject — Assigned
- Book economics & scribal labour (from the generation section)
- Finer subject topic — Assigned
- Manuscript and scribal production Tagged by earlier curation lane (link provenance on record)
- Claim level — Assigned
- Record claim Tagged by earlier curation lane (link provenance on record)
- Method — Assigned
- Market equilibrium, price, and arbitrage Tagged by earlier curation lane (link provenance on record)
- Evidence source — Assigned
- Dated colophons; Egyptian papyri & ostraca; Prices & wages Tagged by earlier curation lane (link provenance on record)
- Research stage — Idea — no test designed
On Inferpedia
This conjecture is linked to the following pages on Inferpedia, an encyclopedia of the missing — working atlas pages, some still early scaffolding.
Provenance
Run: Fresh agent generation · model: claude-fable-5
Composed blind from the model's own knowledge in a zero-tool session and emitted directly as final text.
Novelty / leakage triage
anticipated in the literature — this exact test has never been run
Era-specific book-cost studies exist (Bell et al. for England; Skeat for antiquity) and the labour-dominated, fixed-hand-speed mechanism is understood, but no one has assembled the cross-era series to test the strong claim of a flat 30-100 day-wage real price with no monotonic pre-print trend.
Predictions
No prediction registered yet.
Weigh in
No community feedback yet.
New here? Create an account first
Create an account or sign in and your feedback is tied to you — you can track it, get replies, and claim this conjecture so others know you’re working on it. Prefer not to? Just leave your take below as a guest — only the name you type is shown.
Add your take
Posted immediately (spam is removed). Community feedback is never an adjudicated verdict and never changes this conjecture's triage label or status above.