Table 2.

The average impact of taking double-dose algebra

	2003		2004
Outcomes	Estimate	Robust SE	Estimate	Robust SE
Total semesters
Complier control mean	8.626***	0.211	9.477***	0.333
Treatment effects: all students	0.713***	0.183	0.181	0.252
20% bandwidth	0.621**	0.250	−0.114	0.301
10% bandwidth	1.014**	0.488	−0.548	0.913
Any degree/certificate
Complier control mean	0.124***	0.017	0.153***	0.026
Treatment effects: all students	0.053***	0.016	0.028	0.019
20% bandwidth	0.047*	0.026	0.007	0.025
10% bandwidth	0.060	0.039	−0.034	0.071
4-y degree
Complier control mean	0.055***	0.012	0.096***	0.020
Treatment effects: all students	0.048***	0.014	0.013	0.015
20% bandwidth	0.036*	0.019	−0.022	0.020
10% bandwidth	0.048*	0.029	−0.081	0.052
No. of students
All students	19,800		20,491
20% bandwidth	10,286		10,418
10% bandwidth	5,368		5,408
No. of schools	62		66

***P < 0.01, **P < 0.05, *P < 0.1.