Ammermüller, Andreas; Pischke, Jörn-Steffen - 2006
an index of parents’ highest educational
attainment and report the results in the Appendix.
Table 2 demonstrates that … measure of students’ background, after
some experimentation, we chose a simple index which assigns 1 to the lowest category …
variance in the index for the number of books at home is within schools. The fraction is
higher for the reading test scores …
