William Stanley Jevons

William Stanley Jevons (1835–1882) was a prominent British economist and logician who taught at Owens College and University College London. He was a key figure in the marginalist revolution, independently discovering the concept of marginal utility alongside Carl Menger and Léon Walras. His tragic death by drowning in 1882 cut short a highly influential career.

Jevons was one of the three economists who independently sparked the Marginalist Revolution in the 1870s alongside Carl Menger and Léon Walras. He introduced the concept of marginal utility in his 1871 book, "The Theory of Political Economy." Jevons argued that value is entirely subjective and depends on the final degree of utility of a good.

In a curious historical theory, Jevons attempted to link major economic depressions to the ten-year sunspot cycles observed by astronomers. He hypothesized that variations in solar radiation affected agricultural harvests, which in turn triggered broader economic fluctuations. While this specific theory was later debunked, it showed his dedication to finding empirical explanations for business cycles.

Jevons held significant academic posts in England, notably teaching at Owens College in Manchester before accepting a position at University College London. During his time at these institutions, he published his most rigorous logical and economic treatises. His teaching helped popularize the use of advanced mathematics and statistics in British economic thought.