These data were used by the Office of Institutional Research at the University of New Mexico to forecast fall undergraduate enrollment. Both the January unem- ployment rate and the June high school graduates for a year are known before students enroll in the university in the fall.
The data provide an opportunity to experiment with original data, differences, and lags of the dependent variable as well as the income predictor. In addition, it is interesting to test if the predictors maintain their power over the period involved. Interactions of the predictors with time and interactions with a dummy variable for early versus later years provide alternatives for this investigation.