A branch of critical theory that focuses on human–object interactions in literature and culture, borrowing from Heidegger's distinction between objects and things, which posits that an object becomes a thing when it can no longer serve its common function.

A branch of statistics that deals with estimating the values of parameters based on measured empirical data that has a random component.

(number theory) A set of general techniques for computing or estimating the size of sifted sets of integers.

plural of theory of value

(economics) an economic theory that attempts to explain the exchange value or price of goods and services

plural of cobweb theory

(economics) The economy theory based around the cobweb model.

(mathematics) A theory of integral equations, concerning itself in the narrowest sense with the solution of the Fredholm integral equation.

A branch of probability theory that generalizes the compound Poisson process for arbitrary holding times.

plural of zombie theory