Tightness may refer to: In

mathematics Mathematics is a field of study that discovers and organizes methods, Mathematical theory, theories and theorems that are developed and Mathematical proof, proved for the needs of empirical sciences and mathematics itself. There are many ar ...

, * Tightness of (a collection of) measures is a concept in measure (and probability) theory *

Tightness (topology) In mathematics, a cardinal function (or cardinal invariant) is a function that returns cardinal numbers. Cardinal functions in set theory * The most frequently used cardinal function is the function that assigns to a set ''A'' its cardinality, ...

is also a

cardinal function In mathematics, a cardinal function (or cardinal invariant) is a function that returns cardinal numbers. Cardinal functions in set theory * The most frequently used cardinal function is the function that assigns to a set ''A'' its cardinality, ...

used in general topology In

economics Economics () is a behavioral science that studies the Production (economics), production, distribution (economics), distribution, and Consumption (economics), consumption of goods and services. Economics focuses on the behaviour and interac ...

, * Tightness refers to the degree to which the number of unemployed workers exceed the number of posted job vacancies (or vice versa). *

Market tightness Market tightness is a measure of the liquidity of a market. High market tightness indicates relatively low liquidity and high transaction costs, whereas low market tightness indicates high liquidity and low transaction costs. For example, during th ...

, a point in time where it is very difficult to invest, but it is far easier to sell or to remove investments in return of monetary rewards In other fields, * Tightness of a rope indicates the rope is under tension * Tightness of a sealing means it is impermeable, that it seals well * Tightness is the art of being 'tight' (i.e., stingy or

miser A miser is a person who is reluctant to spend money, sometimes to the point of forgoing even basic comforts and some necessities, in order to hoard money or other possessions. Although the word is sometimes used loosely to characterise anyone ...

ly) * Tightness can refer to something being

cool Cool commonly refers to: * Cool, a moderately low temperature * Cool (aesthetic), an aesthetic of attitude, behavior, and style Cool or COOL may also refer to: Economics * Country of origin labelling * mCOOL - US consumer legislation to enfo ...

See also