Economics · Ch 6 — Distribution Analysis
Rent: Meaning and the Ricardian Theory
Rent: Meaning and the Ricardian Theory
In everyday speech, "rent" can mean the payment for a house, a shop, or even a hired machine. In economics, however, the term originally referred, quite specifically, to the reward earned by LAND for its productive services — and land has two features no other factor shares: its total supply is fixed (perfectly inelastic, since a country cannot manufacture more land), and, in Ricardo's framework, it has no cost of production of its own — it is treated as a "free gift of nature."
The classical economist David Ricardo explained WHY rent arises, and why it differs across plots of land, using a simple and powerful idea. Suppose a growing population needs more and more food. Farmers first cultivate the most fertile land available, since it gives the highest output for a given amount of labour and capital. As demand keeps growing, however, progressively LESS fertile ("inferior") land must also be brought under cultivation to meet it. Eventually, a point is reached where the land taken into cultivation is JUST fertile enough to cover its own cost of cultivation, with nothing left over. This land is called the marginal land or no-rent land — by definition, it earns no rent at all.
Every grade of land BETTER than this margin produces a larger output for the exact same cost of cultivation (the same amount of labour and capital applied). The extra output it produces, over and above what the marginal land yields, valued at the market price of the crop, is Rent.
Ricardian Rent
where is the output of the land grade in question and is the output of the marginal (no-rent) land, BOTH cultivated with the same cost of labour and capital, and is the market price per unit — which Ricardo held is fixed by the average cost of production on the marginal land itself, .
Two consequences follow directly from this reasoning, and both are central to the Ricardian theory:
- Rent is a differential surplus, not a cost of production. Ricardo insisted that rent does NOT enter into the price of the crop — rather, the price is fixed independently by the cost of production on the marginal (no-rent) land, and rent then emerges as a RESIDUAL surplus on every better grade of land. In Ricardo's own famous phrase, "corn is not high because rent is paid, but rent is paid because corn is high" — rent is price-DETERMINED, never price-DETERMINING. …