Fisher separation theorem
E196121
The Fisher separation theorem is a foundational result in financial economics stating that a firm's investment decision can be made independently of its owners' consumption preferences, focusing solely on maximizing the present value of the firm.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fisher separation theorem canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1754433 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Fisher separation theorem Context triple: [Irving Fisher, knownFor, Fisher separation theorem]
-
A.
efficient market hypothesis
The efficient market hypothesis is a financial theory asserting that asset prices fully and immediately reflect all available information, making it impossible to consistently achieve returns above the market average through information-based trading.
-
B.
Coase theorem
The Coase theorem is an economic theory stating that if property rights are well-defined and transaction costs are negligible, private bargaining will lead to an efficient allocation of resources regardless of the initial assignment of rights.
-
C.
Pareto efficiency
Pareto efficiency is an economic concept describing an allocation of resources where no individual can be made better off without making someone else worse off.
-
D.
Ricardian equivalence
Ricardian equivalence is an economic theory proposing that consumers anticipate future taxes implied by government borrowing and therefore adjust their saving so that deficit-financed tax cuts do not affect overall demand.
-
E.
expected utility theory (with John von Neumann)
Expected utility theory (with John von Neumann) is a foundational framework in economics and decision theory that models how rational agents make choices under uncertainty by maximizing the expected value of a utility function.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Fisher separation theorem Target entity description: The Fisher separation theorem is a foundational result in financial economics stating that a firm's investment decision can be made independently of its owners' consumption preferences, focusing solely on maximizing the present value of the firm.
-
A.
efficient market hypothesis
The efficient market hypothesis is a financial theory asserting that asset prices fully and immediately reflect all available information, making it impossible to consistently achieve returns above the market average through information-based trading.
-
B.
Coase theorem
The Coase theorem is an economic theory stating that if property rights are well-defined and transaction costs are negligible, private bargaining will lead to an efficient allocation of resources regardless of the initial assignment of rights.
-
C.
Pareto efficiency
Pareto efficiency is an economic concept describing an allocation of resources where no individual can be made better off without making someone else worse off.
-
D.
Ricardian equivalence
Ricardian equivalence is an economic theory proposing that consumers anticipate future taxes implied by government borrowing and therefore adjust their saving so that deficit-financed tax cuts do not affect overall demand.
-
E.
expected utility theory (with John von Neumann)
Expected utility theory (with John von Neumann) is a foundational framework in economics and decision theory that models how rational agents make choices under uncertainty by maximizing the expected value of a utility function.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
microeconomic theorem
ⓘ
theorem in financial economics ⓘ |
| appliesTo | competitive capital markets ⓘ |
| assumes |
complete and perfect information
ⓘ
investors are rational and maximize expected utility ⓘ investors can borrow and lend at the same risk‑free rate as firms ⓘ no taxes ⓘ no transaction costs ⓘ perfect capital markets ⓘ |
| assumptionType | normative and simplifying assumptions about markets and behavior ⓘ |
| category |
economic theorems
ⓘ
theorems in finance ⓘ |
| clarifies | distinction between production opportunities of the firm and preferences of investors ⓘ |
| consequence |
consumption choices can be made after investment decisions via trading in financial markets
ⓘ
firm’s objective function can be specified without reference to individual utility functions ⓘ |
| contrastsWith | models where managers maximize their own utility instead of firm value ⓘ |
| coreIdea |
firms should choose investment projects that maximize the present value of the firm
ⓘ
investment decisions can be separated from consumption preferences of owners ⓘ optimal investment rule is independent of individual shareholders’ risk preferences under certain conditions ⓘ |
| field |
corporate finance
ⓘ
financial economics ⓘ microeconomics ⓘ |
| formalizedIn | intertemporal choice models ⓘ |
| historicalContext | developed in early 20th‑century work of Irving Fisher ⓘ |
| implies |
all shareholders agree on the same investment rule under its assumptions
ⓘ
firm’s investment decision is to maximize net present value of projects ⓘ production decision of the firm is separate from owners’ consumption decisions ⓘ shareholders can adjust their personal consumption and risk through capital markets ⓘ |
| influenced |
development of normative corporate finance principles
ⓘ
modern theory of the firm in finance ⓘ |
| namedAfter | Irving Fisher ⓘ |
| relatedTo |
Modigliani–Miller theorem
ⓘ
consumption–investment separation ⓘ expected utility theory ⓘ net present value rule ⓘ |
| reliesOn |
competitive equilibrium in capital markets
ⓘ
present value calculation of cash flows ⓘ |
| requires | existence of well‑functioning financial markets for shareholders ⓘ |
| status | foundational result in financial economics ⓘ |
| supports |
separation of ownership and control in corporations
ⓘ
value maximization objective of the firm ⓘ |
| taughtIn |
MBA corporate finance courses
ⓘ
financial economics curricula ⓘ graduate microeconomics courses ⓘ |
| teaches | under ideal conditions, investment and financing decisions can be separated from consumption decisions ⓘ |
| usedIn |
analysis of shareholder unanimity on investment decisions
ⓘ
corporate investment decision‑making theory ⓘ derivation of firm value maximization as a normative rule ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Fisher separation theorem Description of subject: The Fisher separation theorem is a foundational result in financial economics stating that a firm's investment decision can be made independently of its owners' consumption preferences, focusing solely on maximizing the present value of the firm.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.