what model should errors be accounted for when is error correction model useful how to run error correction on time series when to run error correction model which data are stationary and non stationary when can error correction model be used on data what does engle-granger error correction model use which of the following is a condition of the error correction model? is it appropriate to run error correction model on data which are not i when a data pair is stationary what is the error correction model what is the stationarity of the error correction model which of the following is a stationary stock how to tell if a stock is stationary what is stationary data and the first difference of the data why is stationarity and first difference not fixed what is stational what is the stationarity and first difference of a stock when can error correction be applied to a time series what data set is stationary what is the correct error correction model