Gaffney (1992): Rising Inequality and Falling Property Tax Rates

Overview

"Rising Inequality and Falling Property Tax Rates" is Chapter 10 of Gene Wunderlich, ed., Ownership, Tenure, and Taxation of Agricultural Land (Boulder: Westview Press, 1992) — a data-driven study using US Census of Agriculture data to test a specific causal story: that cutting farm property tax rates raises the private share of land rent, which raises land's value as "a store of value, a place to park slack money," which in turn produces larger, less-equally-distributed, and less intensively improved farms.[1] Gaffney states the thesis in his opening paragraph: "Lower farm property taxes are associated with lower ratios of capital to land, and labor to land, both over time and among states. They are also associated with larger mean farm size and less equal distribution of farm sizes."[1] The paper combines a national time-series (1900–1987) with a 50-state cross-section, and is one of the sources cited in Gaffney's own bibliography to Land as a Distinctive Factor of Production as evidence for that essay's B-9 claim that land concentrates in "financially strong hands."[2]

The Time-Series Finding: Falling Tax Rates, Rising Concentration

The national average farm property tax rate peaked at 1.32 percent in 1930, fell to 0.77 percent by 1945, and stabilized near that level (0.85 percent in 1987) — sales and income taxes replaced the lost revenue.[1] Over the same period, mean farm acreage, essentially flat for 65 years (about 155 acres, 1870–1935), tripled to 462 acres by 1987; the number of Americans per farm rose from 11 (1900) to 113 (1987); and the labor-price of a farm — years of wages needed to buy one — rose from roughly 6 years' wages in 1954 to about 17 years' wages in 1987.[1]

Gaffney's primary concentration measure is the farm-acreage Gini ratio (GR), published by the Census Bureau since 1900. It rose only slowly from 0.58 (1900) to 0.63 (1930), then accelerated to 0.70 by 1950 and 0.76 by 1987 — a clear inflection around the 1930 tax-rate peak.[1] Because a standard Gini ratio only measures inequality among surviving farms, Gaffney also constructs an adjusted version that adds the 4.5 million farms that disappeared between 1935 and 1988 back into the distribution as zero-acre farms: this raises the 1988 figure from 0.76 to 0.92, which he calls "a radical rise of inequality since 1930 (.63)."[1] He connects this directly to social history: "In the Great Depression (1930–1941), millions of small farms provided a refuge for the jobless and homeless. Today, that refuge is closed, with explosive social consequences in urban slums."[1]

Rising Land Share, Falling Building Share, on the Largest Holdings

Gaffney's most striking single finding concerns the composition of large holdings, not just their size. Comparing land value ($L) to combined land-and-building value ($L+B) across farm-size brackets, he finds the land share of real estate value (LSREV) rises sharply with farm size, and — using 1988 Agricultural Economics and Land Ownership Survey (AELOS) data ranked by dollar value rather than acreage — that for "landlords with debt," the building share of real estate value (BSREV) falls from 0.11 overall to 0.01 in the top bracket: "the biggest landlord holdings, in dollar value, are 99 percent pure land."[1] Gaffney calls this "an uncommonly strong relationship" precisely because the ranking variable ($L+B) is neutral between land and buildings, so the finding is not an artifact of how farms were sorted.[1] Corroborating indicators point the same way: farms of 2,000+ acres hold 34 percent of all US irrigated land (a proxy for land quality) but only 24 percent of total land-plus-building value, and operator-dwelling share of farm assets — Gaffney's proxy for family labor presence — falls from 48 percent on the smallest farms to 4.4 percent on farms over 2,000 acres.[1]

The Cross-Sectional Test: Wisconsin vs. Florida

The paper's sharpest test compares the 50 states directly. Ranking states by the land share of real estate value, Gaffney contrasts the two poles: Wisconsin has the highest building share (0.47) and a property tax rate roughly four times Florida's; Florida has the lowest building share (0.15).[1] Wisconsin, the high-tax state, leads Florida 3-to-1 in farm output per dollar of farmland value, 5-to-1 in farm buildings per dollar of farmland value, and 7-to-3 in machinery and livestock per dollar of land — while Florida, the low-tax state, leads Wisconsin 2-to-1 in its Gini ratio, 5.5-to-1 in land value per farm, and 4-to-1 in land value per acre.[1] Extending the comparison to the nine highest- and nine lowest-LSREV states ("the Wisconsin 9" and "the Florida 9"), Gaffney reports the pattern holds consistently: "The inverse relationship between [property tax rate] and [Gini ratio] is particularly consistent and noteworthy."[1] His own stated caveat on causal direction: "The issue cannot be settled in a few words, but the implications for tax policy are the same either way. If large units are more efficient, they can bear heavier taxes. If they are less efficient, heavier [property tax rates] will induce them to release surplus land for others."[1]

Interpretation and the A Priori Puzzle

Gaffney flags an apparent tension his own data resolve: a property tax that includes buildings in its base should, in principle, penalize building and fall hardest on smaller farms (whose building-to-land ratio is higher). The data instead show a "stronger countereffect" from the land-value portion of the tax: higher property tax rates are associated with more building per dollar of land, not less, and with more equal farm-size distribution.[1] Gaffney reads this as evidence that the land-value component of a conventional property tax — which penalizes idle, underused land — dominates the building-value component's discouragement effect, and argues the case would be stronger still under a pure land tax exempting buildings entirely: "the property tax would be more progressive if changed to a pure land tax, exempting buildings."[1] He offers two rival explanations for why large landholdings are less improved — that they are simply more efficient at lower input-intensity (which the falling output-per-acre-value data contradict) or, citing Thorstein Veblen's Absentee Ownership, that "many of them are oversized stores of value, held first to park slack money and only secondarily to produce food and fiber" — without adjudicating definitively between the two, though the weight of his own evidence favors the latter.[1]

Standing and Limits

This is a book chapter in a peer-edited academic volume (Westview Press, published under the auspices of an agricultural-economics research program, edited by USDA economist Gene Wunderlich), not a standalone peer-reviewed journal article — closer in standing to Gaffney's other Tideman/Wunderlich-volume chapters than to a refereed paper, though the underlying Census of Agriculture data are official government statistics, not Gaffney's own collection. The analysis is observational and cross-sectional, not a natural experiment or instrumented causal design: Gaffney himself acknowledges the direction-of-causation question is open (efficient large farms bearing heavier taxes vs. inefficient large farms being induced to subdivide by heavier taxes) and does not claim to resolve it statistically. [VERIFY: no formal regression coefficients, standard errors, or significance tests are reported in the chapter — the cross-sectional "evidence" is presented as ranked-state comparisons and scatter description (Figure 10.1), not an econometric model with reported statistics] The scope is US farmland specifically, spanning 1900–1987 — it says nothing directly about urban or commercial split-rate taxation, though the mechanism Gaffney describes (untaxed land value function as a store-of-value asset that crowds out productive use) parallels the urban split-rate literature the wiki already covers extensively at benefits/split-rate-increases-construction. The paper is 34 years old as of this wiki's writing; the wiki has not located a more recent replication using post-1987 Census of Agriculture data, and notes this as an open discovery item for a future wave.

Bears On

• Benefit: Split-rate taxation increases urban construction — adds an agricultural, cross-sectional, 1900–1987 US data point to a literature otherwise built on urban permit data (Pittsburgh, Pennsylvania panels, Finland, Australia): higher property tax rates are independently associated with more building-to-land investment and less speculative land-holding, in a different sector and a longer time horizon than the existing supporting studies.
• Concept: Land Monopoly — supplies a modern, quantitative (Gini-ratio) American case study of land concentration accelerating after a tax-policy change, complementing the wiki's existing historical mechanisms (Smith on primogeniture and entails, Neeson on enclosure, Banner and Daniel on US land dispossession) with a 20th-century, fiscal-policy-driven instance.

See Also

• Gaffney (1994): Land as a Distinctive Factor of Production — the theoretical essay whose B-8/B-9 "strong hands" concentration mechanism this paper tests empirically
• Gaffney (1971): The Property Tax Is A Progressive Tax — the earlier, general companion argument this paper's farmland Gini-ratio data corroborates
• Gaffney (1966): The Benefits of Farm Programs — Incidence, Shifting, and Dissipation — the wiki's other farmland-focused Gaffney study, a different policy lever (subsidy incidence vs. property tax)
• Split-rate taxation increases urban construction
• Land Monopoly
• Split-Rate Taxation
• Mason Gaffney — author page

Sources

1. Mason Gaffney (1992), "Rising Inequality and Falling Property Tax Rates," Chapter 10 in Gene Wunderlich, ed., Ownership, Tenure, and Taxation of Agricultural Land (Boulder: Westview Press), pp. 119–137 — used for the entire page: the 1930–1987 tax-rate and Gini-ratio time series, the land-share/building-share findings, the Wisconsin-vs-Florida cross-state comparison, and Gaffney's own interpretation and caveats. Text extracted this session directly from the source PDF's embedded text layer (pdftotext -layout; clean text layer, no OCR needed), saved to sources/gaffney/text/D1Rising_Inequality_Falling_Prop_Tax_Rates.txt; all quotations verified against that extraction. Free PDF (masongaffney.org) — note: the ampersand in the filename breaks the plain-& URL and the archive.progress.org mirror (both 404); the working URL percent-encodes the ampersand as %26, and the R2 local-mirror copy at scratchpad/cache/gaffney-mirror/publications/ is itself a cached 404 page, not the PDF — a future editor re-running the mirror should re-fetch this file with the percent-encoded URL. This session fetched the working copy directly from masongaffney.org and stored it only in the session scratchpad, not the repository mirror.
2. Gaffney (1994): Land as a Distinctive Factor of Production — used for the cross-reference identifying this paper as Gaffney's own cited evidence for that essay's land-concentration claim (footnote 31 there cites this paper by its chapter title).