Henry George Theorem
The result that, under optimal conditions, the aggregate land rent of a community exactly equals the optimal spending on public goods — so a land tax can fund them with no other tax.
Definition
The Henry George Theorem states that, in a city of optimal size with public goods provided at the optimal level, the aggregate rent of land equals the aggregate expenditure on those public goods. A tax that captures land rent can therefore finance public goods completely, without any tax on labour or capital.
Origin
Though named for Henry George — who argued informally that public investment is capitalised into land values — the theorem was formalised in modern welfare economics by Joseph Stiglitz and others in the late 1970s, most canonically in Arnott & Stiglitz (1979).
The Intuition
Public goods (transit, parks, safety, schools) make a location more desirable. That added desirability shows up as higher land rent. The increase in aggregate rent is, under the theorem's conditions, exactly the value of the public goods. Collecting the rent thus recovers precisely what the public spending created — an elegant, self-financing match.
Significance
The theorem gives Georgism a rigorous foundation in mainstream theory: it is not merely that land taxation is efficient, but that land rent is the natural funding source for public goods. It connects directly to the zero deadweight loss property of land taxes.
See Also
Sources
- Richard Arnott & Joseph Stiglitz (1979), "Aggregate Land Rents, Expenditure on Public Goods, and Optimal City Size," QJE — wiki summary · PDF
- Joseph Stiglitz (1977), "The Theory of Local Public Goods."