Executive Summary
Harvard Extension School instructor Teo Nicolais’s public-facing explainer of the 18-year real estate cycle — mainstream academic validation of the Hoyt/Foldvary/Harrison framework. Traces the four-phase structure from recovery through recession, cites Henry George (1876) as the original observer, and credits Glenn R. Mueller with modern refinements. Explicitly names Foldvary’s 1997 prediction of 2008 as confirmation of the model.
Key Claims
- Cycle originally observed by Henry George, 1876. — confidence: medium
- Homer Hoyt: cycle has run a “steady 18-year rhythm since 1800” per his Chicago study. — confidence: high
- Only two cycle exceptions: World War II and the mid-cycle peak caused by Fed doubling interest rates in 1979. — confidence: medium
- Foldvary’s 1997 prediction quoted in full: “The next major bust, 18 years after the 1990 downturn, will be around 2008, if there is no major interruption such as a global war.” [Source: harvard-extension-2022.md]
- Three early-warning indicators:
- Rise in unsold inventory / vacancy (Expansion→Hypersupply transition)
- Occupancy falls below long-term average (Hypersupply→Recession transition)
- Rise in interest rates (Fed fighting inflation, forces cycle end)
- Land price mechanism cited: William Newman, 1935 — “the price of land begins to reflect not the existing market conditions but rather the anticipated rent growth to come.”
- Phase IV recession: “Vacancy stalks landowners and, as revenues fall below landowners’ fixed costs, foreclosures follow.”
Predictions / Forecasts
- Next crash “around 2024” (per article’s inferred Foldvary-style count from 2008). ⏳ PENDING — directly competing with Harrison’s 2026 / PSE’s 2026–2028 dates.
Notable Quotes
“If George, Harrison, and Foldvary are right, however, that won’t happen until after the next peak around 2024.”
“The delineation point between expansion and market hyper supply is marked by the first indicator of trouble in the real estate cycle: an increase in unsold inventory/vacancy.”
“The next major bust, 18 years after the 1990 downturn, will be around 2008, if there is no major interruption such as a global war.” — Foldvary, 1997
Concepts Referenced
- 18.6-Year Real Estate Cycle — four-phase model
- Hoyt Chicago Land Cycle — empirical basis
- Fred Foldvary — 1997 prediction
- Fred Harrison
- Economic Rent
Cross-References
- Reinforces effectiveagents-18yr-cycle-2026 (same Mueller/Nicolais framework)
- Represents “mainstream” academic endorsement distinct from the Austrian/Georgist school
- Glenn Mueller (University of Denver) — consider entity stub
[Source: raw/harvard-extension-2022.md, fetched 2026-05-03]