(economics) Theory that the price of an object is determined by irrational beliefs and expectations of market participants, rather than intrinsic value; i.e. that one can make money by buying something for the sole reason of selling it to some one else for a higher price.

A movement in academia involving the application of critical theory to issues surrounding the interaction between racial dynamics and social and legal power.

A speculative theory that human language originated from using tongue movements to mimic manual gestures.

A speculative theory that human language originated from the imitation of animal vocalisations.

A speculative theory that human language originated from emotional exclamations of pain, pleasure, surprise, etc.

(physics) A gauge theory that seeks to describe the behaviour of elementary particles using certain Lie groups. It is important in the unification of the electromagnetic force and weak nuclear force.

(economics, political science) The theory, usually associated with Marxian economics, that freely reproducible goods get their value from socially necessary human labor time.

(astronomy) A cosmological model of the universe in which matter is continuously created as the universe expands

A heterodox economic school of thought that posits that fiscal policy, set to constrain inflation and enable full employment, should be the primary economic stabiliser and prioritises reflection on the nature of money from a chartalist perspective.

(set theory) An early and influential axiomatisation of set theory.