Jean-Baptiste Say: History of the Economist
Clay Halton
Jean-Baptiste Say was an 18th century French economist best known today for Say's Law of Markets.
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Investopedia
Jean-Baptiste Say was a French classical liberal economist and scholar. Born in Lyon, Say had a distinguished career. He served on a government finance committee under Napoleon and taught political economy at several schools in France. His law of markets is a classical economic theory that states that production is the source of demand. According to Say's law, the ability to demand something is financed by supplying a different good.

Early Life and Education

Jean-Baptiste Say, also known as J.B. Say, was born on Jan. 5, 1767, in Lyon, France. He went to school in Lyon before moving to London to study business. Say returned to France in 1787 and lived in Paris with his family.

He found work as a secretary in a Paris-based insurance company run by Etienne Claviere, a politician and financier of the French Revolution. This was where he first came across Adam Smith's "An Inquiry into the Nature and Causes of the Wealth of Nations." Say was heavily influenced by Smith's work and, using the connections he made through Claviere, became a journalist.

In 1799, Say became a member of the Tribunate, a kind of economic institute which operated under the French government. Emperor Napoleon Bonaparte, who disliked Say's ideas, removed Say from his post with the institute a few years later.

Say managed to open a cotton-spinning mill in 1807 and six years later, he sold the business. He joined the Conservatory of Arts and Crafts as a chair of industrial economy between 1817 and 1830. He was also a professor at the Collège de France, where he taught political economy. Say remained at the latter school in his position until he died in 1832.

Notable Accomplishments

Say was heavily influenced by Adam Smith and the economic theories he laid out in his 1776 book Wealth of Nations. He was a big proponent of Smith’s free market theories, promoting his laissez-faire philosophies and helping to popularize them in France through his academic work and teaching. Say also expressed the belief that a falling price level could be a positive occurrence if it resulted from productivity gains rather than from deflation.

Say is known for his formulation of Say's Law of Markets or his Theory of Markets. According to the law, a buyer must first produce something of value to sell to obtain purchasing power. This implies that the effective demand in an economy is the result of previous acts of production. As a result, there can never be a sustained general oversupply of goods in an economy because producing economic goods is what creates general demand for goods.

Say's Law does not claim that there can never be imbalances in supply and demand for specific goods. But he believed that they tend toward balances as prices adjust and that this process of price adjustment is also critical to balancing the general demand and supply of all goods.

Published Works

Jean-Baptiste Say wrote about money and banking and shared his views of taxation as burdensome. He's best known for his book titled A Treatise on Political Economy, which was published in 1803.

In addition to his famous Treatise, his other published works include the two-volume Complete Course in Practical Political Economy, which was published in 1852, and a collection of his correspondence with fellow economist Thomas Malthus, titled Letters to Mr. Malthus. This publication discussed and debated his critics' theories of economic growth.

Legacy

Say's Law of Markets lives on in modern neoclassical economic models which argue that if prices are flexible enough for all markets to clear, then the economy will tend toward stability. While it implies that the economy is in a sense self-regulating so that production is ultimately the source of demand, the law has been misinterpreted and frequently taken to mean that supply creates its own demand. Say was a supporter of free trade and competition and championed fewer restrictions on businesses.

Contemporary economists John Maynard Keynes and Thomas Malthus criticized Say’s law. Later economists point to Keynes as partly or chiefly responsible for the confusion over Say's Law, characterizing Keynes's restatement of the Law as a straw man that misrepresents Say's Law in order to further Keynes's arguments at the expense of classical economics.

Say's works (appearing in English translations) found an admiring audience in American founding fathers Thomas Jefferson and James Madison, with whom he actively corresponded. Jefferson was so impressed by Say that he encouraged him to move to Virginia.

Say is credited by Robert L. Formaini in the Federal Reserve Bank of Dallas’s Economic Insights publication as among the first economists to discuss entrepreneurship and notions of utility, describing entrepreneurs as helpful in meeting “human wants.”

Personal Life

Jean-Baptiste Say spent some time in the French military, where he served in a volunteer battalion. In 1793, he married Julie Gourdel-Deloches. This allowed him to avoid mandatory conscription in the military. The couple had two children, Horace Emile Say and Adrienne Say.

Say's wife died in 1830; Say died on Nov. 15, 1832. He is buried in Père Lachaise in Paris.

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