money.def y m i OBS: U.S. economy for the period 1960 to 1983. y = gross national product (billions $) m = money in the form currency and demand deposits (M1, billions $), i = interest rate on 6-month U.S. Treasury Bills (percent) Data Source: They are taken from the Economic Report of the President. Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- y | 24 1443.621 882.6045 506.5 3309.5 m | 24 269.7125 113.6849 141.8 521.1 i | 24 6.329292 2.938611 2.605 13.776