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)
- Equal share ≈$157k/resident (land) / ≈$190k (with resources); flow ≈$9.4–10.4k 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 ≈$54k/yr (roll-measured 85% land share); 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).
- Transition: 20-yr phase-in leaves announcement land prices at 37% of today; most households gain net worth on announcement (claims ≈$190k/person 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.