Academic brief — the Groundshare research program
For: economists in public finance / urban / land economics (candidates listed in
academic-path.md). Purpose: invite collaboration or adversarial review on six
pre-specified questions. Prepared w15; NOT SENT.
What this is
Groundshare is a revenue-neutral, person-based net settlement on assessed land rental value — algebraically a flat LVT plus an equal per-capita dividend, netted (T = s(R̄ − R_held)). It is being developed in public by Floyd Marinescu (Common Wealth Canada) with an explicit commitment: advocacy numbers are the start, not the rest; the core claims are specified as falsifiable questions with pre-registration, open data/code, and invited adversarial review before publication.
What we're asking
One of three engagements, at your appetite: 1. Referee us adversarially — take any claim below and try to break it (we publish the outcome either way); 2. Collaborate on Q1/Q2/Q4/Q5 (Q5 — the site-vs-agglomeration decomposition — is publishable Canadian urban economics independent of the proposal); 3. Advise on method for the commissioned SPSM incidence study (Q2).
The claims on the table (current, all StatCan-derived, 2026 data; canonical
figures in NUMBERS.md, quoted here on the net basis adopted w17)
- Equal share ≈$164k/resident capitalized (net of existing property taxes' land share); annual settleable pool $353–394B/yr; flow ≈$8.5–9.5k per person-yr — range reflects measured resource flows vs stock annuitization.
- Four of five wealth quintiles net recipients (DHEA × NBSA join; approximation documented, believed conservative).
- Median Vancouver detached pays ≈$49k/yr net; median Toronto detached at break-even; average farm holds $4.0M of land (we corrected our own earlier claim publicly when this data came in — one of five published self-corrections to date).
- Land shares measured, not assumed: nine full city rolls, 1.4M parcels, in a
machine-readable open dataset with a committed parser
(
data/land-shares.csv) — BC cities 69–78%, Quebec metros ~⅓, the national-accounts join between them; the allocation-methodology question this raises is itself specified as a four-test research design (analysis/q5-allocation-note.md). - Transition: 20-yr phase-in leaves announcement land prices at ≈37% of today; most households gain net worth on announcement (each person's claim ≈$164k capitalized).
Full workings: github.com/floydmari/groundshare (analysis/ directory; every number's retrieval date and table ID recorded).
What we offer
Data work already assembled (full-table pulls, parcel-roll aggregations), co-authorship where warranted, funding for the Q2 microsimulation through standard channels (disclosed), and the standing rule that referees who break our claims get thanked in public.