Question: f y subscript t has a unit root, how can the series be made stationary? a. y subscript t space minus space y subscript t

f y subscript t has a unit root, how can the series be made stationary? a. y subscript t space minus space y subscript t minus 1 end subscript b. dy/ dt c. y subscript t space minus space top enclose y d. left parenthesis y subscript t space minus space top enclose y right parenthesis squared

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