. 2019 Mar 29;79(5):883–910. doi: 10.1177/0013164419837321

Table 3.

Ordinary Least Squares and Quantile Regression Estimates in Mathematics and Reading Achievement.

	Mathematics						Reading
	Mean regression	Median regression	10th	25th	75th	90th	Mean regression	Median regression	10th	25th	75th	90th
IV
Grades K to 8
Treatment effect	0.004	−0.027	0.000	−0.034	−0.047	−0.088	−0.036	−0.061	−0.077	−0.053	−0.027	−0.054
SE	0.073	0.062	0.070	0.066	0.069	0.080	0.058	0.059	0.057	0.054	0.063	0.073
Number of schools	70						70
Number of students	29,757						29,671
Grades K to 2
Treatment effect	−0.225^*	−0.191	−0.246	−0.217	−0.206^*	−0.271^*	−0.198^*	−0.169	−0.221^*	−0.185^*	−0.162^*	−0.300
SE	0.045	0.099	0.202	0.129	0.068	0.097	0.042	0.121	0.108	0.077	0.075	0.155
Number of schools	30						30
Number of students	6,159						6,180
Grades 3 to 8
Treatment effect	0.099	0.047	0.074	0.035	0.036	−0.028	0.040	−0.010	−0.037	−0.012	0.027	0.047
SE	0.094	0.074	0.091	0.079	0.092	0.098	0.073	0.062	0.077	0.070	0.081	0.090
Number of schools	70						70
Number of students	23,598						23,491
ITT
Grades K to 8
Treatment effect	0.003	−0.004	0.032	−0.003	−0.000	−0.009	−0.026	−0.029	−0.059	−0.030	0.002	−0.013
SE	0.053	0.053	0.057	0.057	0.054	0.053	0.043	0.044	0.046	0.042	0.042	0.053
Number of schools	70						70
Number of students	29,757						29,671
Grades K to 2
Treatment effect	−0.225^*	−0.191^*	−0.246^*	−0.218^*	−0.205^*	−0.271^*	−0.198^*	−0.169^*	−0.221^*	−0.185^*	−0.162^*	−0.292^*
SE	0.045	0.050	0.057	0.055	0.038	0.033	0.043	0.042	0.058	0.049	0.043	0.072
Number of schools	30						30
Number of students	6,159						6,180
Grades 3 to 8
Treatment effect	0.066	0.057	0.112	0.059	0.063	0.046	0.027	0.012	−0.012	0.015	0.043	0.078
SE	0.062	0.061	0.060	0.069	0.064	0.064	0.049	0.047	0.052	0.050	0.049	0.060
Number of schools	70						70
Number of students	23,598						23,491
TOT
Grades K to 8
Treatment effect	−0.045	−0.039	−0.000	−0.038	−0.054	−0.095	−0.054	−0.055	−0.071	−0.039	−0.043	−0.062
SE	0.061	0.063	0.066	0.064	0.061	0.072	0.050	0.049	0.052	0.044	0.052	0.070
Number of schools	55						55
Number of students	19,300						19,280
Grades K to 2
Treatment effect	−0.206^*	−0.173^*	−0.234^*	−0.191^*	−0.177^*	−0.270^*	−0.206^*	−0.168^*	−0.247^*	−0.200^*	−0.142^*	−0.313^*
SE	0.055	0.058	0.063	0.056	0.047	0.044	0.048	0.047	0.065	0.050	0.046	0.090
Number of schools	26						26
Number of students	5,666						5,685
Grades 3 to 8
Treatment effect	0.030	0.055	0.066	0.049	0.023	−0.066	0.010	0.004	−0.011	0.024	0.012	0.046
SE	0.079	0.076	0.071	0.086	0.091	0.089	0.061	0.059	0.060	0.055	0.065	0.083
Number of schools	49						49
Number of students	13,634						13,595

Note. SE = standard error; IV = instrumental variables; ITT = intention to treat; TOT = treatment on the treated.

p≤ .05.