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Say's Law

June 06, 2009
By Eleanor Arnason | June 2, 2009 • From Wikipedia:
Say's law, or the law of markets, is an economic proposition attributed to French businessman and economist Jean-Baptiste Say (1767–1832), which states that in a free market economy goods and services are produced for exchange with other goods and services, and in the process a precisely sufficient level of real income is created in order to purchase the economy's entire output. That is to say, the total supply of goods and services in a purely free market economy will exactly equal the total demand during any given time period – in modern terms, "there will never be a general glut", though there may be local imbalances, with gluts in one market balanced by disgluts in others.
As far as I know, supply side economics derives from Say's Law. Supply creates demand -- build it and they will come; make it and people will have money to buy.
Facts and Fictions - Eleanor Arnason writes science fiction and fantasy. Occasional posts are republished with permission from her blog.
I grew up in the long shadow of the 1930s, when demand vanished; and there was a general glut, an entire economy full of goods which could not find buyers; and there did not appear to be an end to the situation, until the government began pumping money into the economy, first through the New Deal and then through war spending. Supply side economics seemed pretty clearly disproved as a theory. What mattered was demand, and getting money into the hands of ordinary people, so they could spend it. Supply side returned in the Reagan years. I still think it's nuts. Now, as the economy keeps settling down and down, economists are taking another look at John Maynard Keynes, who said endless stagnation is possible. This brings me to a favorite story, which I have told before. Walter Reuther and Henry Ford are walking through the Ford Rouge plant, and Henry waves his hand around at the enormous factory and says, "Someday all this work will be done by robots." Walter says, "Who's going to buy the cars, Henry?"
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Say's Law

It's possible that Say's Law was true when he concieved it. It's certainly not true today. Based on a lifetime devoted to product development, I contend that its easier to make something than sell it. To sell something one must create something someone else wants and produce it for a price they will pay. Keynes said demand is as important as supply. He also pointed out that demand requires money in the hands of people who will spend it - which was exactly Reuther's point. If people have no money, they can't buy anything. I know it sounds nuts, but the best thing we can do for the economy today is to give money to those who will spend it. It is possible to do well by doing good!

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Facts and Fictions - Eleanor Arnason writes science fiction and fantasy. Occasional posts are republished with permission from her blog.

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