# 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 ?
Y] does not incorporate any dependencies, so that effectively variables are independent and for simplicity the time-series values are free of serial correlation.
The spectra of three of the stars revealed emissions from hydrogen and ionized helium--a dead giveaway, according to the team, of activity associated with cataclysmic variables.
Other variables sometimes included in statistical prediction are number of dependents, earnings prior to injury, time elapsed between the date of injury and date of referral for rehabilitation services, type of rehabilitation services provided, type of agency providing those services, and presence of a previous disability (Talley, 1988).
The key variables that determine the breakeven holding period are the pretax rates of return for the annuity and the mutual fund, the taxpayer's tax rate during the accumulation period, the taxpayer's tax rate at the time the annuity is cashed out, whether the annuity's earnings are subject to the 10% penalty tax, (see the sidebar on pages 74-75 for a summary of income tax rules affecting annuities) and the annual charges imposed on an annuity in excess of those charged a mutual fund with similar risk and return characteristics.
The Focus 100 "high-speed graphing" capability, which draws real-time charts of two variables such as injection pressure and screw position, has been enhanced with a feature PlantStar calls "Signature Analysis.
To become a VARIABLES sponsor, contact Jill Roth, program director, at (941) 927-5431 or jroth@prismb2b.
Emener's (1980) dependent variables included numbers of closures in different closure categories, including Status 26 (rehabilitated) closures, and success rate, which was defined as the ratio of Status 26 closures to the total caseload.
These changes can include a whole range of variables such as private branding, different languages, flavors, nutrition information, colors, contents, etc.
The purpose of this research was to achieve a feasibility study by investigating the relationship between closure status (successfully rehabilitated-status 26 and unsuccessfully rehabilitated-statuses 28 and 30) and disability beneficiary status (Supplemental Security Income-SSI, Social Security Disability Insurance-SSDI, and SSI/SSDI) on each of five intake variables (age, highest grade completed, marital status, major disabling condition, and monthly family income) and separately on each of the three process variables (cost of case services, number of services received, and number of months on agency rolls).
a leading provider of high-performance Verilog simulators announced support for variable precision computation in its Super FinSim Verilog simulators.

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