Variable

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Variable

An element in a model. For example, in the model RS&Pt+1 = a + b Tbill t + et, where RS&Pt+1 is the return on the S&P in month t+1 and Tbill is the Tbill return at month t, both RS&P and Tbill are "variables" because they change through time; i.e., they are not constant.

Variable

Anything that does not have a set value. In basic algebra, a variable is often expressed as "x." Variables in economics and finance may be measures such as GDP, prices, or interest rates. Analysts use complicated equations to determine the value of some variables at the present time and even more complicated equations to predict their possible future values. See also: Regression.

variable

Something, such as stock prices, earnings, dividend payments, interest rates, and gross domestic product, that has no fixed quantitative value. See also dependent variable, independent variable.
References in periodicals archive ?
The number of urbanized cells in this neighborhood is counted, as it is one of the spatial variables in the ANN.
The coefficients for all the spatial variables are all statistically significant contributors to an overall understanding of this model.
To determine the utility of neural networks as an areal interpolation procedure, 16 neural network models containing various combinations of the four explicitly spatial and three implicitly spatial variables were created for three categories of scale change (town-to-tract, tract-to-block group, and town-to-block group).
Examples of topics addressed include entropy solutions of nonlinear elliptic-parabolic-hyperbolic degenerate problems in one dimension, the comparison principle for a class of coupled systems of fully nonlinear parabolic equations under nonlocal boundary conditions, information complexity of evolutionary dynamics, the modified Lagrange multiplier rule and its application to the regularity of magnetic flux function in nuclear fusion, variational hyperbolic inequality in the domains unbounded in spatial variables, representation of exact solution of the compound Burgers-Korteweg-de Vries equation, and critical curves for a degenerate parabolic system with nonlinear boundary conditions.
Based on these results, it appears that utilising spatial variables such as distance to the coast in addition to a comprehensive classification of view can add significantly to the estimation of residential property values.

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