Hirano & Stiglitz: Credit, Land Speculation, and Long-Run Economic Growth / Low-Interest-Rate Policy

Summary

Tomohiro Hirano and Joseph E. Stiglitz have circulated this project under two NBER working-paper numbers with closely related but not identical titles — "Credit, Land Speculation, and Long-Run Economic Growth" (NBER Working Paper 32479, May 2024) and "Credit, Land Speculation, and Low-Interest-Rate Policy" (NBER Working Paper 33661, April 2025). The two abstracts describe the same model, the same central findings (near-verbatim in places), and Hirano's own research page lists a single project — "Credit Expansion, Land Speculation, and Low-Interest-Rate Policy," first circulated April 2024, now Revise-and-Resubmit at the Journal of Monetary Economics — consistent with 33661 being a retitled, revised NBER reissue of the same underlying paper rather than a genuinely distinct study. This page treats them as one project and cites both working-paper numbers; if a future full-text comparison finds substantive differences between the two versions, this page should be split.

The Model and Central Finding

The paper builds a two-sector overlapping-generations model with credit frictions, in which economic growth originates in one sector — "manufacturing" — with productivity spillovers to the other, "real estate," which does not itself generate growth. This lets the authors ask a sharper question than "does credit expansion help or hurt growth": which sector the credit flows to.

The headline result: it is not aggregate credit expansion that matters for long-run productivity and growth, but its sectoral composition. Credit expansions concentrated in real estate financing are productivity- and growth-retarding; credit expansions concentrated in productive capital investment financing are growth-enhancing. Lower interest rates and looser collateral requirements, absent financial regulation, can channel credit disproportionately into land speculation via leverage — crowding out the capital investment that actually drives growth. The paper opens by citing real empirical support for this sectoral-composition claim: Verner (2019) found rapid credit expansion systematically predicts growth slowdowns, and Müller & Verner (2023), using a database spanning 117 countries since 1940, found credit expansion to construction/real estate specifically predicts subsequent productivity and growth slowdowns, while credit expansion to manufacturing predicts higher productivity and growth — the paper's model is built to be consistent with this documented empirical pattern, not merely a theoretical curiosity.

A second notable technical result: the equilibrium price of land remains finite even when the safe interest rate is below the growth rate (r < g) — a case where standard macro models would predict land prices explode without bound. This gives the paper's framework a distinct answer to a puzzle that recurs across the wider Hirano-Stiglitz program: how land markets stay bounded even under conditions textbook models say they shouldn't.

The Land-Tax Result

The conclusion states the paper's policy mechanism directly: a tax on the return to holding land (reducing it from D to (1-τ)D), with revenue used to subsidize the productive sector, can be shown under the paper's own conditions to reduce equilibrium land speculation, which directly increases the equilibrium growth rate (g*). This is a cleaner, more straightforwardly Georgist-supportive result than the companion "wobbly dynamics" paper's more ambiguous finding about land taxes and fluctuation magnitude — here, taxing land redirects resources toward the growth-generating sector with no destabilizing side effect flagged in the model.

The authors also note a historical policy precedent for the underlying "redirect credit toward the productive sector" logic: Nicholas Kaldor's push, under the Wilson government, for a selective employment tax to shift resources toward manufacturing on the grounds that it exhibited greater returns to scale and learning (Kaldor, 1966) — the same sector-targeting logic this paper formalizes for credit rather than labor.

Relation to the Georgist Case

This paper connects two of the wiki's existing empirical threads with a formal growth mechanism: it is the theoretical counterpart to the outcome page documenting that modern banking growth is largely mortgage credit against land (that page's empirical evidence — credit's increasing concentration in real estate collateral — is exactly the mechanism this paper models as growth-retarding), and it supplies a specific channel for taxing land raises productivity: not merely by removing a deadweight loss, but by actively redirecting scarce credit away from land speculation and toward the sector that generates spillover-driven growth.

Nuances and Limits

• Which version is authoritative is uncertain. As noted above, this page treats NBER 32479 and 33661 as the same project at different revision stages based on matching abstracts and Hirano's own single-project listing, but this has not been confirmed against a side-by-side full-text comparison.
• Endogenous-growth modeling choices are load-bearing. The result depends on the assumption that manufacturing, specifically, is the source of learning/spillover-driven growth while real estate is not — a modeling choice grounded in the Verner/Müller-Verner empirical pattern the authors cite, but a choice nonetheless, not a proven universal fact about all economies.
• Full text of 33661 not independently obtained. This session could not fetch the 33661 PDF (blocked); its content is inferred from its abstract, which is near-identical to 32479's, whose full PDF was read directly.

Bears On

• Benefit: LVT dampens land speculation — this paper's land-tax-reduces-speculation-raises-growth result is one of the cleanest formal mechanisms in the whole research program.
• Benefit: Taxing land raises productivity — a specific credit-reallocation channel for this outcome.
• Outcome: The growth of modern banking is largely mortgage credit against land — this paper's empirical premise (real-estate-concentrated credit is common and growth-retarding) is exactly what that page's evidence documents; read together.

See Also

• Joseph Stiglitz · Tomohiro Hirano
• Hirano & Stiglitz: Henry George, Land Speculation, and Economic Growth
• The growth of modern banking is largely mortgage credit against land
• LVT dampens land speculation

Sources

1. Tomohiro Hirano & Joseph E. Stiglitz (2024), "Credit, Land Speculation, and Long-Run Economic Growth," NBER Working Paper 32479 (May 2024). NBER PDF — downloaded and read (abstract, introduction, and conclusion; 54-page paper) 2026-08-18; used for the two-sector model setup, the sectoral-composition-matters-more-than- aggregate-volume finding, the Verner (2019) and Müller & Verner (2023) empirical citations, the finite-land-price-despite-r<g result, the land-tax-raises-growth conclusion, and the Kaldor selective-employment-tax historical reference (A-claim; full text read for these sections, quotations verified verbatim against the PDF).
2. Tomohiro Hirano & Joseph E. Stiglitz (2025), "Credit, Land Speculation, and Low-Interest-Rate Policy," NBER Working Paper 33661 (April 2025). nber.org/papers/w33661 — abstract fetched and read 2026-08-18 (full PDF blocked); used for confirming the same central findings recur in this later-numbered version (B-claim; abstract-level only for this specific working paper).
3. Emil Verner (2019), cited in source 1 — credit-expansion-predicts-growth-slowdowns finding, not independently verified this session (secondary citation within source 1).
4. Karsten Müller & Emil Verner (2023), cited in source 1 — 117-country, since-1940 sectoral-credit database finding that real-estate/construction credit expansion predicts productivity and growth slowdowns while manufacturing credit expansion predicts the opposite, not independently verified this session (secondary citation within source 1).