Introduction to Econometrics 3rd Edition by James Stock, Mark Watson

Exercise 10

The regression shown in column (2) was estimated again, this time using data from 1992 (4000 observations selected at random from the March 1993 CPS, converted into 1998 dollars using the consumer price index). The results are
= 0.77 + 5.29 College - 2.59Female + OAOAge, SER = 5.85, R 2 = 0.21. (0.98) (0.20) (0.18) (0.03)
Comparing this regression to the regression for 1998 shown in column (2), was there a statistically significant change in the coefficient on College