The Economic & Behavioural Impacts of Land Value Taxes & Net Wealth Taxes in OECD Countries: A Realist Review

Summary

This report is an MSc-dissertation-derived "realist review" by Sam Wolstenholme-Britt, a University of Edinburgh MSc Social Research student, produced during a 10-week SWAY placement with Reform Scotland, a Scottish public-policy institute. [VERIFY: the report never spells out what "SWAY" stands for; this entry follows the source's self-description as a University of Edinburgh MSc-placement programme.] The cover-page byline reads "Sam Wostenholme-Britt," a typographical dropped "l"; every other occurrence, including the "About Sam Wolstenholme-Britt" biography, spells the surname Wolstenholme-Britt. The registry's existing author field is confirmed correct on surname and affiliation; this entry adds the given name. Fetched in full (39 pages) from the Internet Archive's capture of the Reform Scotland PDF.

The review compares three wealth-ownership taxes across OECD countries — split-rate land value taxes (LVT), recurrent net wealth taxes (NWT), and one-off net wealth taxes (capital levies) — asking what contextual and design factors determine whether each delivers on its economic theory in practice. Commissioned for Scottish tax-reform debate, it explicitly declines to recommend a policy choice, instead distilling a decision-tree of questions for policymakers.

The Core Argument / Findings

Split-rate LVT (Pennsylvania). Because pure LVT is rare (only Australia, Denmark, and Estonia among OECD countries, per the report), the review leans on the larger evidence base for split-rate LVT in Pennsylvania municipalities. It distinguishes an incentive effect (lowering the tax on buildings encourages development) from a liquidity effect (raising the tax on land increases holding costs, forcing more intensive use). Of eight studies reviewed (Cord 1983; Bourassa 1987, 1990; Mathis and Zech 1982; Oates and Schwab 1997; Plassmann and Tideman 2000; Banzhaf and Lavery 2010; Yang 2014), six found development increased after a switch to split-rate taxation, one found no effect, and one found mixed city-level results. Where studies disaggregated the two mechanisms, the incentive effect was significant but the liquidity effect was not (Bourassa 1987, 1990), and the incentive effect itself depended on excess demand for construction (Oates and Schwab, 1997). Three studies found the added development took the form of more units rather than larger ones, i.e. increased density rather than sprawl. The review's own summary: development "depends on: (1) whether the tax is replacing an existing property tax; and (2) the level of demand for new development" — implying an LVT introduced with no prior property tax, as in Scotland, "may have little impact on urban development."

Recurrent NWTs (Spain and Switzerland — the two OECD countries that levy NWT subnationally). Spain's NWT raised only 44.6% of its theoretical maximum revenue in 2014 (Durán-Cabré and Esteller-Moré), with the richest 10% of taxpayers responsible for 75% of that gap. Wealth-elasticity estimates are large in both countries: a 1-point NWT rate increase is associated with a 15.3% one-year (32.4% four-year) decline in reported Spanish wealth, and a 34.5% decline in reported Swiss wealth (Brülhart et al., 2016). A within-Switzerland comparison of Lucerne (large NWT cut) and Bern (small cut) found wealth in Lucerne grew 33.7 points more over six years — 21% from housing-price capitalisation, 24% from migration (only 7% international), and 50% from reported financial assets, of which most reflects previously undisclosed wealth being disclosed rather than real income or savings change. Spain's 1994 business-asset exemption saw the share of exempt assets held by the top 0.01% of taxpayers rise from 37% to 80%. A 1-point NWT rate cut is associated with a 9-point rise in Switzerland's top-1% wealth share after five years (Marti, Martínez and Scheuer, 2023).

One-off NWTs (capital levies). Comparing interwar levies in Austria, Hungary, and Czechoslovakia, implementation speed proved decisive: Czechoslovakia's levy, enacted within months, raised 8.2% of national income toward war debt, while Austria's and Hungary's, delayed 16 months and by a revolution respectively, triggered capital flight and hyperinflation that erased most revenue. Post-WWII Western European levies, paired with Bretton Woods-era capital controls and asset-blocking, succeeded far more consistently — supporting Robson's (1959) claim that capital controls, not the levy's one-off character alone, prevent flight from undermining a levy's credibility and revenue.

Relation to the Georgist Case

The paper opens its LVT section from the standard Georgist premise — land's fixed supply means the tax burden cannot be shifted to consumers and falls on the owner, making LVT "neutral" in standard theory — and treats the land/structure separation problem as increasingly surmountable via computer-assisted mass appraisal and GIS. Its distinctive contribution is comparative: set beside the NWT literature, LVT's base cannot migrate, be reclassified into an exempt asset class, or move offshore the way NWT wealth demonstrably does in Spain and Switzerland — the review documents no comparable avoidance channel for LVT, only administrative valuation difficulty. That asymmetry is indirect evidence for the wiki's claim that LVT's efficiency case rests on a genuinely fixed base, unlike broader wealth or capital taxes (see LVT can replace capital taxes without efficiency loss). At the same time, the finding that the liquidity effect — the mechanism most distinctively Georgist, since it comes from taxing land itself rather than relieving a tax on buildings — is weak in the Pennsylvania evidence is an honest complication for claims that LVT alone reliably spurs development absent a prior property tax to replace.

Nuances and Limits

• A narrative "realist review," not a systematic review or meta-analysis. Produced by a single MSc student over a 10-week placement, it synthesises existing literature rather than running original analysis, with no formal search protocol or quality-scoring of included studies.
• Narrow geographic base for the LVT claims. The split-rate evidence is almost entirely Pennsylvania municipalities, which the author notes "disproportionately experienced population decline, had high poverty rates, were denser, and had older housing" than comparison cities. The review does not extend its own analysis to pure LVT in Denmark, Estonia, or Australia, citing a prior Scottish Land Commission review that found existing pure-LVT evidence "not sufficient to draw conclusions" about development effects.
• NWT evidence limited to two countries by design — Spain and Switzerland, chosen for their subnational structure fitting Scotland's devolved context, not for global representativeness.
• Elasticity estimates conflate real and reporting responses. Roughly half of the Lucerne–Bern wealth-response gap reflects previously unreported assets being disclosed rather than real behavioural change — a caveat against reading NWT elasticities as pure avoidance or flight.
• No independent revenue-adequacy analysis for LVT. The LVT section covers development and density effects, not fiscal capacity; its relevance to revenue-sufficiency debates is indirect, via the wealth-tax avoidance contrast, not direct.

Bears On

• Objection: LVT can't raise enough revenue — bears indirectly: the review does not quantify LVT's own revenue potential, but its finding that NWTs lose 44%+ of theoretical revenue to avoidance and underreporting is evidence for the broader claim that a fixed, immobile base is comparatively avoidance-proof, strengthening the response without directly measuring LVT yield.
• Benefit: Taxing land and rents increases productivity — qualifies the evidence: supports a development effect from split-rate LVT under specific conditions, while finding the land-tax-specific liquidity effect weaker than the incentive effect from relieving the buildings tax.
• Benefit: LVT can replace capital taxes without efficiency loss — supports by contrast: documents how an elastic, mobile wealth-tax base erodes under avoidance and migration in a way a fixed land base does not.

See Also

• Land Value Tax
• Taxing land and rents increases productivity
• LVT can replace capital taxes without efficiency loss
• Objection: LVT can't raise enough revenue
• Taxation and Economic Growth (OECD Working Paper 620)

Sources

1. Sam Wolstenholme-Britt (2024), "The Economic & Behavioural Impacts of Land Value Taxes & Net Wealth Taxes in OECD Countries: A Realist Review," Reform Scotland / University of Edinburgh SWAY programme. Archived PDF — used for all findings, quotations, and the study-by-study synthesis of Pennsylvania split-rate LVT, Spanish and Swiss net-wealth-tax, and interwar/postwar capital-levy evidence; fetched and read in full (39 pages) this session.
2. Bourassa, S.C. (1990), "Land Value Taxation and Housing Development: Effects of the Property Tax Reform in Three Types of Cities," American Journal of Economics & Sociology 49(1): 101–112, https://doi.org/10.1111/j.1536-7150.1990.tb02264.x — used for the incentive-versus-liquidity-effect decomposition cited via the SWAY review; not independently re-verified beyond the review's own summary.
3. Brülhart, M. et al. (2022), "Behavioral Responses to Wealth Taxes: Evidence from Switzerland," American Economic Journal: Economic Policy 14(4): 111–150, https://doi.org/10.1257/pol.20200258 — used for the Lucerne–Bern wealth-response decomposition, cited via the SWAY review.
4. Durán-Cabré, J. and Esteller-Moré, A. (2021), "A Quantitative Assessment of the Net Wealth Tax: The Spanish Experience," CESifo Economic Studies 67(4): 488–510, https://doi.org/10.1093/cesifo/ifab004 — used for the Spanish NWT tax-gap figure, cited via the SWAY review.