David Ricardo：On the Principles of Political Economy and Taxation, Excerpt 78

If from a consideration of these circumstances, the profits of stock should be so adjusted that in one trade they were 20, in another 25, and in another 30 per cent., they would probably continue permanently with that relative difference, and with that difference only; for if any cause should elevate the profits of one of these trades 10 per cent. either these profits would be temporary, and would soon again fall back to their usual station, or the profits of the others would be elevated in the same proportion.

Source： https://www.gutenberg.org/ebooks/33310
Locator：Excerpt 78 · Verified：2026-10-19 · Verification：Short excerpt

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