The Hidden Taxable Capacity of Land: Enough and to Spare

Summary

In this 2009 paper Mason Gaffney addresses the most common revenue objection to Georgism head-on: is there enough land rent to actually fund government? His answer is an emphatic yes. He argues that conventional estimates drastically understate land's taxable capacity by omitting categories of rent and by ignoring how the tax base expands once distortionary taxes are removed. The paper was published, peer-reviewed, as Mason Gaffney (2009), "The hidden taxable capacity of land: enough and to spare," International Journal of Social Economics 36(4): 328–411 — an 84-page article, confirmed by a full read of the published version (see Provenance below), rather than only the UCR working-paper mirror this page previously cited alone.[1]

Key Argument — 16 Elements in 4 Groups

Gaffney organizes the paper around 16 "elements" of land's taxable capacity, grouped into four Groups, that conventional public-finance data either trivialize or omit entirely — a structure the paper's own abstract summarizes and this page now mirrors, having been read in full:[1]

• Group A (Elements 1–4) — correcting the downward bias in standard data sources. Element 1 catalogues why assessed values, IRS data, NIPA, Federal Reserve, and Lincoln Institute/NBER estimates all understate land value (he singles out the "land-residual" assessment method, multiply-depreciated buildings changing hands, and Raymond Goldsmith's widely-cited but methodologically threadbare 13–15% land-share estimate, built by extrapolating from 1950s FHA-insured tract housing to the entire US real estate stock). He contrasts this with the textbook figure Krugman and Wells (2006) report — rent at only 1% of US income in 2004 — as the kind of "official" number these biased sources produce. Element 2 documents land and resource price rises (oil, copper, the 2001–07 land boom) outrunning the outdated estimates still in circulation. Element 3 argues the land fraction of real estate is systematically lowballed, citing Wilks's Whitstable rating study (England), Wendt on San Francisco/Oakland, Cowan on Sydney/Johannesburg/Wellington, and Gaffney's own 1963–66 Milwaukee cadastral mapping — the same underlying dataset his 1969 Land Planning article and 1998 Philosophy of Public Finance chapter draw on. Element 4 covers farmland.
• Group B (Elements 5–12) — broadening the concept of land/rent, and rents gained from tax reform itself. Elements 5–10 extend the land-rent concept to unconventional categories: rents best tapped by variable/use charges, taxes for conservation in lieu of subsidy, "novel, unseen, and unrecognized lands," unconventional de facto tenures, and rents currently dissipated by correctable policy. Element 11 restates ATCOR (All Taxes Come Out of Rent): removing other taxes shifts value into land rent. Element 12 restates EBCOR (Excess Burden Comes Out of Rent): removing a tax's deadweight loss, not just its revenue, adds a further increment to the rent base — a second, distinct mechanism this page's earlier summary did not separately name.
• Group C (Elements 13–14) — rate freedom and unseen valuations. Element 13 argues a rent tax, having no excess burden, removes the conventional revenue-maximizing rate ceiling that constrains ordinary taxes. Element 14 is "the unseen reservoir of huge internal valuations and holdout prices" — land whose owners' own behavior (refusal to sell, self-insurance against forced sale) reveals a valuation far above any recorded transaction.
• Group D (Elements 15–16) — moot possibilities offered for future exploration, not asserted as established. Element 15 is the provocative suggestion that mortgage interest could be reconceived as a form of land rent; Element 16 argues taxing land (a domestically fixed asset) instead of mobile capital and labor would improve the US balance of payments via a "multiplier effect." Gaffney frames both explicitly as speculative, not part of his core case.

The combined effect, he argues, is a rent base "enough and to spare" to replace existing taxes — with Elements 11–12 (ATCOR/EBCOR) supplying the base-expansion mechanism specifically.

Standing and Limits

• Where it sits in the debate. This is the advocacy side's most systematic answer to the revenue-insufficiency objection — the objection page steelmans Krugman's and Blaug's doubts against it. The mainstream data side of the same question is carried by Larson's BEA estimate and Albouy's metro land values; the national companion calculation is Dwyer's Australian study.
• Claim class. Gaffney was a credentialed economist (UC Riverside) writing as a committed Georgist: the enumeration of omitted rent categories is checkable (C-claims); the "enough and to spare" conclusion leans on ATCOR, which is a hypothesis awaiting direct empirical test — the wiki reports the conclusion as Gaffney's argument, not settled measurement.
• Distinguish the papers. This 2009 paper is distinct from Gaffney's 2005 "Physiocratic Concept of ATCOR" essay, which states the base-expansion mechanism itself; the two are often conflated in citations.

Provenance

2026-07-18 update. This page previously cited only a UCR working-paper mirror (economics.ucr.edu/papers/papers08/08-12old.pdf) and summarized the paper from a partial read. A separate 84-page scanned copy circulating on masongaffney.org (G2009-Hidden_Taxable_Capacity_of_Land_2009.pdf, flagged in the corpus triage log as an un-OCR'd file possibly representing a distinct "2009 expansion") was OCR'd in full this session (pdftoppm -r 250 + Tesseract 5.3.4, 84 pages, ~47,100 words extracted) and read completely. The two are the same paper, not a distinct or expanded edition: the masongaffney.org scan carries the Emerald/International Journal of Social Economics cover page and structured abstract (Vol. 36 No. 4, 2009, pp. 328–411) — i.e. it is the peer-reviewed published version of the paper the UCR working-paper mirror also carries, confirmed by an identical 16-Element/4-Group structure, identical section headings, and identical illustrative material (Kahn, Davidson, Goldsmith, Krugman and Wells, Sinai and Gyourko) in both. This upgrades the paper's citable standing from "working paper" to "peer-reviewed journal article," and lets this page's Key Argument section state the 16-element structure precisely rather than summarizing loosely. Canonical OCR text mirrored to sources/gaffney/text/G2009-Hidden_Taxable_Capacity_of_Land_2009.txt. Registry Scan Depth upgraded Medium → Heavy accordingly.

Bears On

• Outcome: Land rent could fund government
• Objection: LVT can't raise enough revenue — the reply side
• Concept: ATCOR · EBCOR

See Also

• Dwyer (2003), Taxable Capacity of Australian Land — the national companion
• Larson (2015), BEA land value estimate — the official-data side
• Gaffney (1998), The Philosophy of Public Finance — the earlier book chapter that supplies this paper's philosophical and algebraic groundwork
• EBCOR — the excess-burden companion mechanism to ATCOR, Element 12 of this paper
• Gaffney & Noyes (1998): The Income-Stimulating Incentives of the Property Tax — a related, earlier Gaffney taxonomy of rent-yielding resources, in the same corpus
• Mason Gaffney

Sources

1. Mason Gaffney (2009), "The hidden taxable capacity of land: enough and to spare," International Journal of Social Economics 36(4): 328–411 — used for the hidden-rent enumeration (16 Elements/4 Groups), the ATCOR/EBCOR-based conclusion, and the illustrative data points above (C/D-claims, advocate-economist writing in a peer-reviewed journal, attributed). Read in full this session from the published version. Working-paper mirror PDF · Published-version scan PDF (masongaffney.org) · 📄 Local copy · local OCR mirror at sources/gaffney/text/G2009-Hidden_Taxable_Capacity_of_Land_2009.txt.
2. Complete free archive of Gaffney's work: masongaffney.org — used for the 2005/2009 paper distinction (A-claim).