All Economic Theory

In mathematics and economics, the envelope theorem is a major result about the differentiability properties of the value function of a parameterized optimization problem.

In portfolio theory, a mutual fund separation theorem, mutual fund theorem, or separation theorem is a theorem stating that, under certain conditions, any investor's optimal portfolio can be

In economics, the Debreu's theorems are preference representation theorems-statements about the representation of a preference ordering by a real-valued utility function.

The Sonnenschein-Mantel-Debreu theorem is an important result in general equilibrium economics, proved by Gérard Debreu, Rolf Mantel, and Hugo F.

Edgeworth's limit theorem is an economic theorem, named after Francis Ysidro Edgeworth, stating that the core of an economy shrinks to the set of Walrasian equilibria as the number of agents increases to infinity.

Shephard's lemma is a result in microeconomics having applications in the theory of the firm and in consumer choice.

Roy's identity (named after French economist René Roy) is a major result in microeconomics having applications in consumer choice and the theory of the firm.

The Coase theorem () postulates the economic efficiency of an economic allocation or outcome in the presence of externalities.

The Modigliani-Miller theorem (of Franco Modigliani, Merton Miller) is an influential element of economic theory; it forms the basis for modern thinking on capital structure.

The Dorfman-Steiner theorem (or Dorfman-Steiner condition) is a neoclassical economics theorem which looks for the optimal level of advertising that a firm should undertake.

The Greenwald-Stiglitz theorem shows that an economy with externalities or distortions associated with imperfect information and incomplete markets is in general not constrained Pareto optimal, and there exist government interventions such as taxes and subsidies to make a Pareto improvement.

In mathematical economics, Topkis's theorem is a result that is useful for establishing comparative statics.

Uzawa's theorem, also known as the steady-state growth theorem, is a theorem in economic growth that identifies the necessary functional form of technological change for achieving a balanced growth path in the Solow-Swan and Ramsey-Cass-Koopmans growth models.

In Economics, the Fisher separation theorem asserts that the primary objective of a corporation will be the maximization of its present value, regardless of the preferences of its shareholders.

In economics, Holmström's theorem is an impossibility theorem or trilemma attributed to Bengt R.

There are two fundamental theorems of welfare economics.

Weller's theorem is a theorem in economics.

The theory is named for 19th-century U.S. political economist and activist Henry George.

Okishio's theorem is a theorem formulated by Japanese economist Nobuo Okishio.

In financial economics, the no-trade theorem states