Why Economics Quotes Get Misattributed — and What the Errors Cause

Why Economics Quotes Get Mangled

Compression: A memorable fragment survives while the sentence around it is dropped, which is how Keynes's methodological point about the long run became a slogan that seems to dismiss the future entirely.
Prestige transfer: A line drifts toward the most famous plausible name — Einstein for anything about compound interest, Friedman for the free lunch — because a big name makes a quotation feel more authoritative.
Source substitution: A phrase is credited to an author's most famous book rather than its real source, which is why Keynes's 1923 line is so often attributed to the 1936 General Theory.
Slogan drift: A campaign phrase or a book title detaches from its origin and is reassigned to the person who benefited from it, as with a Clinton campaign line credited to Clinton himself.
Convenient context loss: An uncomfortable origin, like Carlyle's pro-slavery essay, is quietly replaced by a tamer story that lets the phrase circulate without its baggage.

Four Misattributions Worth Knowing

Einstein and compound interest: The claim that Einstein called compound interest the eighth wonder of the world, or humanity's greatest invention, has no reliable source and did not appear in print in his lifetime; it is a modern fabrication attached to a trusted name.
'It's the economy, stupid': This was an internal note by campaign strategist James Carville, one of three points posted for staff in Bill Clinton's 1992 campaign, not a public statement by Clinton himself.
Friedman and the free lunch: Friedman popularised the phrase in a 1975 book title; it comes from an older saloon tradition and he did not coin it.
Keynes on the long run: Genuine, but from A Tract on Monetary Reform (1923), not the General Theory, and about the limits of equilibrium reasoning in a crisis rather than a licence to ignore the future.

What a Bad Quote Actually Does

It inverts the argument: The compressed Keynes line is often used to caricature him as reckless about long-term consequences, the near-opposite of his actual point about honest analysis during a slump.
It launders a false claim: The Einstein compound-interest line lends a fabricated maxim the authority of the twentieth century's most trusted scientist, so it is repeated as settled wisdom.
It erases the real author: Crediting Clinton for Carville's phrase removes the strategist who coined it and misrepresents how the idea entered politics.
It hides uncomfortable history: The sanitised story of the dismal science conceals that the label came from a defence of slavery aimed at economists who opposed it.
It corrodes trust: Once readers learn a famous quotation is fake, they discount genuine ones too, which is a real cost to public understanding.

How to Check an Economics Quote

The reliable habit is to ask for a specific source — book, chapter or article, and ideally a date — rather than a bare name. Genuine quotations almost always have one: Keynes's long-run line is A Tract on Monetary Reform (1923); Smith's butcher passage is book one, chapter two of The Wealth of Nations (1776); Friedman's monetary line recurs across his lectures and writings. Fabrications tend to resist this test, surfacing only as unsourced maxims on quote sites, which is itself a warning sign. Where a real quotation exists but its origin is contested, the honest response is to say so rather than to pick the tidiest attribution. And where the context is unflattering — as with Carlyle's phrase — accuracy means keeping the context attached, because the context is often the whole point.