The initial changes in the relative prices between producers' goods, and consumers' goods, resulting from a change in their relative demands, cause a movement of goods to other stages of production – a definite price relationship will only result once this transition is complete. Later...
The most renown theory of the French economist, Jean Baptiste Say (1767-1832), the eponymous Say’s Law has been one of the most important contributions of Classical economics even though it was but a minor facet of Say’s own economics. He introduced it in Chapter XV of Book I of his A Treatise...