Table 9.4. Three regression models of teacher salaries in the U.S. states and the District of Columbia A B C Percentage of state residents with a college degree 704.02* 24.56 (140.22) (231.72) Per capita income 0.68* 0.66* (0.11) (0.19) Intercept 28768.01* 21168.11* 21161.07" (3913.27) (4102.40) (4144.96) R2 0.34 0.47 0.47 n 51 51 51 Notes: The dependent variable is the average salary of public elementary and secondary school teachers. Standard errors are in parentheses. *=p