primary and middle school students' test scores in math, Hebrew, and English. One standard deviation improvement in … doesn't vary with students' socio-economic background, is highly non-linear, increases sharply for superintendents in the …

primary and middle school students' test scores in math, Hebrew, and English. One standard deviation improvement in … doesn't vary with students' socio-economic background, is highly non-linear, increases sharply for superintendents in the …

students' ability and past achievement, I use instrumental variables that are derived from two allocation rules that partly … suggest that increasing instruction hours and reducing class size have significant effects on students' achievements. The OLS …