Jean-Baptiste Say (; 5 January 1767 – 15 November 1832) was a
liberal French economist and businessman who argued in favor of
competition
Competition is a rivalry where two or more parties strive for a common goal which cannot be shared: where one's gain is the other's loss (an example of which is a zero-sum game). Competition can arise between entities such as organisms, ind ...
,
free trade
Free trade is a trade policy that does not restrict imports or exports. It can also be understood as the free market idea applied to international trade. In government, free trade is predominantly advocated by political parties that hold ...
and lifting restraints on business. He is best known for
Say's law—also known as the law of markets—which he popularized. Scholars disagree on the surprisingly subtle question of whether it was Say who first stated what is now called Say's law. Moreover, he was one of the first economists to study
entrepreneurship
Entrepreneurship is the creation or extraction of economic value. With this definition, entrepreneurship is viewed as change, generally entailing risk beyond what is normally encountered in starting a business, which may include other values t ...
and conceptualized entrepreneurs as organizers and leaders of the economy.
Early life

Say was born in
Lyon
Lyon,, ; Occitan: ''Lion'', hist. ''Lionés'' also spelled in English as Lyons, is the third-largest city and second-largest metropolitan area of France. It is located at the confluence of the rivers Rhône and Saône, to the northwest of ...
. His father Jean-Etienne Say was born to a
Protestant
Protestantism is a Christian denomination, branch of Christianity that follows the theological tenets of the Reformation, Protestant Reformation, a movement that began seeking to reform the Catholic Church from within in the 16th century agai ...
family which had moved from
Nîmes to
Geneva
Geneva ( ; french: Genève ) frp, Genèva ; german: link=no, Genf ; it, Ginevra ; rm, Genevra is the second-most populous city in Switzerland (after Zürich) and the most populous city of Romandy, the French-speaking part of Switzerland. Situ ...
for some time in consequence of the revocation of the
Edict of Nantes
The Edict of Nantes () was signed in April 1598 by King Henry IV and granted the Calvinist Protestants of France, also known as Huguenots, substantial rights in the nation, which was in essence completely Catholic. In the edict, Henry aim ...
. Say was intended to follow a commercial career and in 1785 was sent with his brother Horace to complete his education in England. He lodged for a time in
Croydon
Croydon is a large town in south London, England, south of Charing Cross. Part of the London Borough of Croydon, a local government district of Greater London. It is one of the largest commercial districts in Greater London, with an extens ...
and afterwards (following a return visit to France) in
Fulham
Fulham () is an area of the London Borough of Hammersmith & Fulham in West London, England, southwest of Charing Cross. It lies on the north bank of the River Thames, bordering Hammersmith, Kensington and Chelsea. The area faces Wandswo ...
. During the latter period, he was employed successively by two London-based firms of sugar merchants, James Baillie & Co and Samuel and William Hibbert. At the end of 1786, he accompanied Samuel Hibbert on a voyage to France which ended in December with Hibbert's death in
Nantes
Nantes (, , ; Gallo: or ; ) is a city in Loire-Atlantique on the Loire, from the Atlantic coast. The city is the sixth largest in France, with a population of 314,138 in Nantes proper and a metropolitan area of nearly 1 million inhabit ...
. Say returned to Paris, where he found employment in the office of a
life assurance company directed by
Étienne Clavière. His brother
Louis Auguste (1774–1840) also became an economist.
Writings, teaching and entrepreneurship
Say's first literary attempt was a pamphlet on the liberty of the press, published in 1789. He later worked under
Mirabeau on the ''Courrier de Provence''. In 1792, he took part as a volunteer in the campaign of
Champagne. In 1793, he assumed in keeping with
French Revolution
The French Revolution ( ) was a period of radical political and societal change in France that began with the Estates General of 1789 and ended with the formation of the French Consulate in November 1799. Many of its ideas are conside ...
ary fashion the pseudonym Atticus and became secretary to
Étienne Clavière, the then finance minister.
From 1794 to 1800, he edited a periodical, entitled ''La Decade philosophique, litteraire, et politique'', in which he expounded the doctrines of
Adam Smith. He had by this time established his reputation as a publicist and when the
consular government was established in 1799 he was selected as one of the 100 members of the
Tribunat, resigning the editorship of the ''Decade''. In 1800, Say published ''Olbie, ou essai sur les moyens de réformer les mœurs d'une nation''. In 1803, he published his principal work, the ''
Traité d'économie politique ou simple exposition de la manière dont se forment, se distribuent et se composent les richesses''. Having proved unwilling to compromise his convictions in the interests of
Napoleon, Say was removed from the office of tribune in 1804. He turned to industrial activities and after having familiarised himself with the processes of cotton manufacture he established a
spinning-mill at
Auchy-lès-Hesdin in the
Pas de Calais which employed some 400–500 people, mainly women and children. He devoted his leisure time to revising his economic treatise which had been out of print for some time, but the system of state censorship in place prevented him from republishing it.
In 1814, Say availed himself (to use his own words) of the relative liberty arising from the
entrance of the allied powers into France to bring out a second edition of the work dedicated to the emperor
Alexander I of Russia
Alexander I (; – ) was Emperor of Russia from 1801, the first King of Congress Poland from 1815, and the Grand Duke of Finland from 1809 to his death. He was the eldest son of Emperor Paul I and Sophie Dorothea of Württemberg.
The son of Gra ...
, who had professed himself his pupil. In the same year, the French government sent him to study the economic condition of the United Kingdom. The results of his observations appeared in a tract, ''De l'Angleterre et des Anglais''. A third edition of the ''Traité'' appeared in 1817.
A chair of industrial economy was established for him in 1819 at the
Conservatoire des Arts et Métiers. In 1825, he became a member of the improvement council of the ''École spéciale de commerce et d'industrie'', one of the first
business school
A business school is a university-level institution that confers degrees in business administration or management. A business school may also be referred to as school of management, management school, school of business administration, o ...
s in the world. In 1831, he was made professor of political economy at the
Collège de France. In 1828–1830, he published his ''Cours complet d'économie politique pratique''.
Say's law
Say is well known for Say's law, or the law of markets, often controversially summarised as:
* "
Aggregate supply creates its own
aggregate demand"
* "
Supply creates its own demand"
Say's law is instead uncontroversially summarized as:
* "Supply constitutes its own demand"
* "Inherent in supply is the wherewithal for its own consumption" (direct translation from French ''Traité d'économie politique'')
The exact phrase "supply creates its own demand" was coined by
John Maynard Keynes
John Maynard Keynes, 1st Baron Keynes, ( ; 5 June 1883 – 21 April 1946), was an English economist whose ideas fundamentally changed the theory and practice of macroeconomics and the economic policies of governments. Originally trained in ...
, who criticized it as in the former two, equating all four of these statements to mean the same thing. Some economists, including some advocates of Say's law who dispute this characterization as a misrepresentation, have disputed his interpretation, claiming that Say's law can actually be summarized more accurately as "production precedes consumption" and that Say was claiming that in order to consume one must produce something of value so that one can trade this (either in the form of money or barter) in order to consume later.
Similar sentiments through different wordings appear in the work of
John Stuart Mill (1848) and his father
James Mill (1808). The Scottish classical economist James Mill restates Say's law in 1808, writing that "production of commodities creates, and is the one and universal cause which creates a market for the commodities produced".
In Say's language, "products are paid for with products" (1803, p. 153) or "a glut can take place only when there are too many means of production applied to one kind of product and not enough to another" (1803, pp. 178–179). Explaining his point at length, he wrote the following:
Say also wrote that it is not the abundance of money, but the abundance of other products in general that facilitates sales:
Say's law may also have been culled from
Ecclesiastes
Ecclesiastes (; hbo, קֹהֶלֶת, Qōheleṯ, grc, Ἐκκλησιαστής, Ekklēsiastēs) is one of the Ketuvim ("Writings") of the Hebrew Bible and part of the Wisdom literature of the Christian Old Testament. The title commonly ...
5:11 – "When goods increase, they are increased that eat them: and what good is there to the owners thereof, saving the beholding of them with their eyes?" (
KJV). Say's law has been considered by
John Kenneth Galbraith as "the most distinguished example of the stability of economic ideas, including when they are wrong".
Say's law emerged during the early period of the
Industrial Revolution
The Industrial Revolution was the transition to new manufacturing processes in Great Britain, continental Europe, and the United States, that occurred during the period from around 1760 to about 1820–1840. This transition included going f ...
, at a time when the economic phenomena of increased output merged with England's cyclical inability to maintain both sales and unemployment. This led many to believe that there was a limit to the growth of production, and there may come a point when there is no means of purchasing all output generated. Say's Law of Markets deals with the fact that production of commodities causes income to be paid to suppliers of the components of capital, labor, and land used in producing these goods and services. The sale price of these commodities is the sum of the payments of wages, rents, and profit. Income generated during production of a commodity equals the value of that commodity. Therefore, an increase in the supply of output will result in an increase in the income necessary to generate demand for those products. In the words of Jean-Baptiste Say, "unless we produce, we cannot consume; unless we first supply, we cannot demand".
Theory of entrepreneurship
In the ''Treatise'', his main economic work, Say stated that any production process required effort, knowledge and the "application" of the entrepreneur. According to him, entrepreneurs are intermediaries in the production process who combine productive agents such as land, capital and labor in order to meet the demand of consumers. As a result, they play a central role in the economy and fulfil a coordinating role.
Besides studying large-scale entrepreneurs, Say looked at people working for themselves:
Say also thought about which qualities are essential for successful entrepreneurs and highlighted the quality of judgement. To his mind, entrepreneurs have to continuously assess market needs and the means which could meet them, which requires an "unerring market sense".
As he emphasized the coordinating function of entrepreneurs, Say viewed entrepreneurial income primarily as high wages that are paid in compensation for the skills and expert knowledge of entrepreneurs. He did so by making a distinction between the enterprise function and the supply-of-capital-function which allowed him to look at the earnings of the entrepreneur on the one hand and the remuneration of capital on the other hand. This clearly differentiates his theory from that of
Joseph Schumpeter
Joseph Alois Schumpeter (; February 8, 1883 – January 8, 1950) was an Austrian-born political economist. He served briefly as Finance Minister of German-Austria in 1919. In 1932, he emigrated to the United States to become a professor at H ...
, who described entrepreneurial rent as short-term profits that compensate for high risk (
Schumpeterian rent).
Say also touched upon
risk
In simple terms, risk is the possibility of something bad happening. Risk involves uncertainty about the effects/implications of an activity with respect to something that humans value (such as health, well-being, wealth, property or the environme ...
and
uncertainty
Uncertainty refers to Epistemology, epistemic situations involving imperfect or unknown information. It applies to predictions of future events, to physical measurements that are already made, or to the unknown. Uncertainty arises in partially ...
as well as
innovation
Innovation is the practical implementation of ideas that result in the introduction of new goods or service (economics), services or improvement in offering goods or services. ISO TC 279 in the standard ISO 56000:2020 defines innovation as "a ...
when discussing entrepreneurship, although he never deeply investigated their relationships. However, Say stated:
Personal life
In 1793, Say married Mlle Deloche, daughter of a former lawyer.
Honours
In 1826, Say was elected a foreign member of the
Royal Swedish Academy of Sciences.
Later years and death

In his later years, Say became subject to attacks of nervous
apoplexy
Apoplexy () is rupture of an internal organ and the accompanying symptoms. The term formerly referred to what is now called a stroke. Nowadays, health care professionals do not use the term, but instead specify the anatomic location of the bleed ...
. He lost his wife in January 1830 and from that time his health declined. When the
revolution of that year broke out, Say was named a member of the council-general of the department of the
Seine
The Seine ( , ) is a river in northern France. Its drainage basin is in the Paris Basin (a geological relative lowland) covering most of northern France. It rises at Source-Seine, northwest of Dijon in northeastern France in the Langres plate ...
, but he found it necessary to resign.
Say died in Paris on 15 November 1832 and was buried in the
Père Lachaise Cemetery.
References
Further reading
*
*
* .
* Garello, Jacques Garello (29 January 2011)
"Portrait: J.B. Say (1767–1832)" ''La nouvelle lettre''. 1064: 8.
*
* .
*
* .
External links
*
*
ttp://socserv2.socsci.mcmaster.ca/~econ/ugcm/3ll3/say/treatise.pdf ''A Treatise on Political Economy''at McMaster University Archive for the History of Economic Thought
''Letters to Malthus on Several Subjects of Political Economy'' (1821)at McMaster University Archive for the History of Economic Thought
Guide to the Jean Baptiste Say Collection 1794–1821at th
University of Chicago Special Collections Research Center
{{DEFAULTSORT:Say, Jean-Baptiste
1767 births
1832 deaths
19th-century French economists
19th-century French male writers
Burials at Père Lachaise Cemetery
Businesspeople from Lyon
Classical economists
Collège de France faculty
French classical liberals
French politicians
French Protestants
French male non-fiction writers
Members of the Royal Swedish Academy of Sciences
Conservatoire national des arts et métiers alumni