John Hicks

John Hicks was awarded the 1972 Nobel Memorial Prize in Economic Sciences alongside Kenneth Arrow. The Royal Swedish Academy recognized Hicks for his pioneering contributions to general equilibrium theory and welfare economics. His work provided crucial mathematical tools still used in modern microeconomics.

The Hicksian demand function, named after John Hicks, illustrates the combination of goods a consumer would buy to achieve a specific level of utility at given prices. It isolates the pure substitution effect of a price change by theoretically holding the consumer's utility constant. This concept is fundamentally taught in microeconomics to distinguish between income and substitution effects.

The IS-LM model is a macroeconomic tool that shows the relationship between interest rates and real output in the goods and money markets. John Hicks famously formalized this model in 1937 as a graphical mathematical representation of John Maynard Keynes's theories. It became the standard textbook model for Keynesian macroeconomics for decades.

The Hicks Compensation Test is a criterion used to evaluate whether an economic change improves social welfare without needing to make interpersonal utility comparisons. It asks whether those who gain from a change could theoretically fully compensate the losers, leaving everyone better off. This test remains a foundational concept in the field of welfare economics.