Summary
Gaffney’s peer-reviewed 2009 paper in AJES synthesizes Hoyt’s land-cycle research with Henry George’s theory of land speculation, providing an 8-element (expanded to ~20-element) anatomy of how a land boom unfolds and crashes. He argues the crisis of 2009 was entirely predictable from the 18-year pattern documented since Hoyt’s 1933 Chicago study. The paper proposes the property tax (specifically its land-value component) as the structural tool to prevent speculative bubbles.
Key Claims
- The 18-year cycle “has persisted over the last 800 years” with interruptions only from major wars and plagues — confidence: medium [Source: Gaffney, AJES, 2009]
- Hoyt’s 1933 Chicago study identified five major cycles cresting in 1837, 1857, 1873, 1893, and 1926–1929 — evidence replicated by Fisher in Cleveland, Chicago, Milwaukee, Toledo, San Francisco, Detroit, Grand Rapids — confidence: high [Source: Gaffney, AJES, 2009]
- Gaffney’s 20-element cycle anatomy: population grows → rents rise → building values rise → new construction → easy credit → speculative platting exceeds demand → “builders’ illusion” (conflating land-price gains with building returns) → subprime lending → bank capital erodes → crash — confidence: high [Source: Gaffney, AJES, 2009]
- “Builders’ Illusion”: builders confuse rising land prices with returns on construction investment, leading to overproduction of buildings — a novel mechanism not in Hoyt — confidence: high [Source: Gaffney, AJES, 2009]
- Rising land prices cannot simply plateau at a high level — because increment has been priced in, failure to rise equals necessity to drop — confidence: high [Source: Gaffney, AJES, 2009]
- Property tax on land value prevents speculative holding: frequent accurate reassessment is essential for the tax to be effective — confidence: high [Source: Gaffney, AJES, 2009]
- Gaffney cites Harrison (1997) predicting “global depression of 2010” and Foldvary (1997) predicting bust “around 2008” — both based on Hoyt’s 18-year cycle — confidence: high [Source: Gaffney, AJES, 2009]
Notable Quotes
“Capital locked up in projects that are started during a land bubble is effectively lost during the downturn, leaving the nation without sufficient capital to finance ordinary business operations during the recovery period.”
“The boom is initiated by rapid growth of construction and land prices interacting in a rising spiral, and the cycle is completed with an equally rapid fall, first in land values, then in construction activity.”
“Governments and leading gurus blame the crash on falling land values, bend their efforts to bailing out big banks and sustaining land values, prolonging the depression… the stage is set to begin the next cycle.”