a cross-section from 1985-89
number of observations : 5748
observation : individuals
country : United States
A dataframe containing :
total math scaled score
total reading scaled score
type of class, a factor with levels (regular,small.class,regular.with.aide)
years of total teaching experience
a factor with levels (boy,girl)
qualified for free lunch ?
a factor with levels (white,black,other)
school indicator variable
Stock, James H. and Mark W. Watson (2003) Introduction to Econometrics, Addison-Wesley Educational Publishers, chapter 11.