David Ricardo：On the Principles of Political Economy and Taxation, Excerpt 316

Adam Smith has justly observed, that it is extremely difficult to determine the rate of the profits of stock. "Profit is so fluctuating, that even in a particular trade, and much more in trades in general, it would be difficult to state the average rate of it. To judge of what it may have been formerly, or in remote periods of time, with any degree of precision, must be altogether impossible." Yet since it is evident that much will be given for the use of money, when much can be made by it, he suggests, that "the market rate of interest will lead us to form some notion of the rate of profits, and the history of the progress of interest afford us that of the progress of profits." Undoubtedly if the market rate of interest could be accurately known for any considerable period, we should have a tolerably correct criterion, by which to estimate the progress of profits.

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Locator：Excerpt 316 · Verified：2026-10-19 · Verification：Short excerpt

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