Suppose that the data in a time-series study were entered in reverse chronological order. Would this change in any way the testing or adjusting for serial correlation? How? In particular:

a. What happens to the Durbin–Watson statistic’s ability to detect serial correlation if the order is reversed?

b. What happens to the GLS method’s ability to adjust for serial correlation if the order is reversed?

c. What is the intuitive economic explanation of reverse serial correlation?