Question: Go to the Census Bureau Internet site [http://www.census.gov] and in sequence select "E" in the Subjects area, "Educational Attainment," and "Table A-3" under Historical Tables to find information on earnings of workers by education.

a. What are the annual earnings for high school and college graduates in 1975 and for the most recent year shown?

b. What is ratio of the earnings of college graduates to high school graduates in 1975? In the most recent year?

c. Has the ratio increased or decreased over this period?

d. What factors might help explain this change?