Before using the OLS method we need to verify the information, it is recommended that you store that data, if the data is non Stationary stationary can be used to make an Augmented test method Dickey-Fuller is Stationary then we use OLS method.
Before using the OLS method, we need to check to make sure that the data if the data is non stationary Stationary, we will use the Augmented Dickey-Fuller test to keep data Stationary Subsequently, we will use OLS.
Before using the method of OLS we must check to make sure that data Stationary if the information is non stationary, we will use the method. Augmented Dickey-Fuller test to that the information is Stationary then method we use, OLS