William Stanley Jevons citations
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William Stanley Jevons est un économiste et un logicien britannique né le 1er septembre 1835 à Liverpool et mort le 13 août 1882 à Bulverhythe. Il est considéré comme le cofondateur de l'école néoclassique et de la « révolution marginaliste », avec Léon Walras et Carl Menger.

La « révolution marginaliste » se fonde sur l'apparition de nouvelles notions telles que celle d'utilité marginale. Celle-ci augmente au fur et à mesure que la quantité disponible d'un bien diminue. Autrement dit, plus le bien est rare, plus son utilité marginale est grande. Exemple : l'utilité marginale de l'eau est très faible lorsqu'on en a déjà en abondance, mais elle est très grande lorsqu'on n'en a pas du tout ; l'utilité marginale du diamant semble, du moins aux échelles habituelles, décroître plus lentement avec son abondance .

Pour Jevons, il est important de partir des faits. Sa réputation d'économiste est d'abord venue du livre The Coal Question basé sur des données. Cette méthode est explicitée dans Treatise on Logic and Scientific Method et le différencie de Léon Walras qui est davantage hypothético-déductif.

À l'encontre des économistes dit classiques qui adoptaient une approche synthétique, Jevons est en faveur d'une spécialisation des économistes dans les divers champs que recouvre cette discipline. Wikipedia  

✵ 1. septembre 1835 – 13. août 1882
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William Stanley Jevons: 69   citations 0   J'aime

William Stanley Jevons: Citations en anglais

“The difficulties of economics are mainly the difficulties of conceiving clearly and fully the conditions of utility.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter III, Theory of Utility, p. 82.

“Over-production is not possible in all branches of industry at once, but it is possible in some as compared to others.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter V, Theory of Labour, p. 172.

“It is clear that economics, if it is to be a science at all, must be a mathematical science.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter I, Introduction, p. 38.

“A spade may be made of any size, and if the same number of strokes be made in the hour, the requisite exertion will vary nearly as the cube of the length of the blade.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter V, Theory of Labour, p. 173.

“One pound invested for five years gives the same result as five pounds invested for one year, the product being five pound years.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter VII, Theory of Capital, p. 190.

“I feel quite unable to adopt the opinion that the moment goods pass into the possession of the consumer they cease altogether to have the attributes of capital.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter VII, Theory of Capital, p. 209.

“but, in reality, there is no such thing as an exact science.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter I, Introduction, p. 40.

“What capital I give for the spade merely replaces what the manufacturer had already invested in the expectation that the spade would be needed.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter VII, Theory of Capital, p. 188.

“Some of the gold possessed by the Romans is doubtless mixed with what we now possess; and some small part of it will be handed down as long as the human race exists.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter VII, Theory of Capital, p. 198.

“By a commodity we shall understand any object, substance, action or service, which can afford pleasure or ward off pain.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter III, Theory of Utility, p. 61.

“that in the same open market, at any one moment, there cannot be two prices for the same kind of article”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter IV, Theory of Exchange, p. 97.

“Repeated reflection and inquiry have led me to the somewhat novel opinion, that value depends entirely upon utility.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter I, Introduction, p. 37.

“we often observe that there is abundance of capital to be had at low rates of interest, while there are also large numbers of artisans starving for want of employment.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter VIII, Concluding Remarks, p. 215.

“We shall never have a science of economics unless we learn to discern the operation of law even among the most perplexing complications and apparent interruptions.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter IV, Theory of Exchange, p. 110.

“[F]acts are valueless unless connected and explained by a correct theory; […] analogies are very dangerous grounds of inference, unless carefully founded on similar conditions; […] experience misleads if it be misinterpreted.”

"The Railways and the State." https://archive.org/stream/essaysaddresses00oweniala#page/467/mode/2up In Essays and Addresses, Macmillan & Co., 1874, page 467.

“One of the first and most difficult steps in a science is to conceive clearly the nature of the magnitudes about which we are arguing.”

William Stanley Jevons The Theory of Political Economy

Source: The Theory of Political Economy (1871), Chapter III, Theory of Utility, p. 78.

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