LAIR: Economic Liberalism, David Ricardo (August 25)

1. Excerpt from "Principles of Political Economy and Taxation" by David Ricardo (1817):

"The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labour which is necessary for its production, and not on the greater or less compensation which is paid for that labour."

"Utility then is not the measure of exchangeable value, although it is absolutely essential to it. If a commodity were in no way useful,—in other words, if it could in no way contribute to our gratification,—it would be destitute of exchangeable value, however scarce it might be, or whatever quantity of labour might be necessary to procure it."

"If the quantity of labour realized in commodities, regulate their exchangeable value, every increase of the quantity of labour must augment the value of that commodity on which it is exercised, as every diminution must lower it."

2. Excerpt from David Ricardo's entry in The Concise Encyclopedia of Economics:

"In his Essay on the Influence of a Low Price of Corn on the Profits of Stock (1815), Ricardo articulated what came to be known as the law of diminishing marginal returns. One of the most famous laws of economics, it holds that as more and more resources are combined in production with a fixed resource—for example, as more labor and machinery are used on a fixed amount of land—the additions to output will diminish.

Ricardo also opposed the protectionist Corn Laws, which restricted imports of wheat. In arguing for free trade, Ricardo formulated the idea of comparative costs, today called comparative advantage—a very subtle idea that is the main basis for most economists’ belief in free trade today. The idea is this: a country that trades for products it can get at lower cost from another country is better off than if it had made the products at home."

3. "Introduction to Ricardo" by Lynne Kiesling