“I’m doing my part to help the economy!”
I’ve heard many folks make this joke after a big purchase. We snicker. We know they really bought it for the personal benefits they expect to gain. As we’ve been discussing in the comments, they bought it because they valued it more than what they gave up.
The joke implies the multiplier effect — the idea that your purchase stimulates economic activity. You buy a car, which means income for the car maker and workers, they spend that income on suits and shoes, and so on. And, by the time it’s all said and done every dollar of your purchase ‘stimulated’ more than a dollars worth of economic activity, which is measured as GDP.
For some reason, we don’t snicker when economists and politicians make this same claim. We should.
David Henderson, who doesn’t make this claim, does a great job explaining why we should snicker in his aptly titled essay, GDP Fetishism, which I discovered after reading a recent post of his about the ‘multiplier’ of foreign aid.
Also recommended, his latest post about subjective value, which is a topic we’ve touched on here recently in the comments.