Definition of "variables" []

• Plural form of variable. (noun)

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• "Regression using instrument variables is essentially a two-stage regression: first, you regress the price of beer against the log of the instrument variable (use the beer tax, I'm almost positive it's a going to be a better instrument than general sales tax or beer tax + sales tax); second, you regress the log of the quantity of beer consumed against the log of the estimated price of beer obtained from the first regression."
• "Infact, after controlling for regional heterogeneity, any one of these three variables is sufficient to subsume the impact of regime type on wars, militarized interstate disputes (MIDs), and fatal disputes."
• "Real-time and historical data on temperature, pressure, wind speed, and many other variables is immediately available for mathematical analysis and visualization."