Table 3

APIP Adoption Effects Over Time

Effect of the APIP over time
	Sample: schools that adopt APIP and future-APIP adopters
	1	2	3	4	5	6
	log of AP course enrollment	percent 11th and 12th graders taking AB/IB exams	log of graduates	log of SAT/ACT takers	log score above 1100/24 on SAT/ACT	ln attend college
First year	0.0805 [0.0787]	1.8791 [0.9338]^*	0.0099 [0.0148]	−0.0315 [0.0451]	0.1578 [0.0331]^**	0.0521 [0.0315]
Second year	0.0942 [0.0928]	3.8755 [1.5498]^*	0.0107 [0.0234]	−0.0482 [0.0868]	0.2275 [0.0262]^**	0.0602 [0.0250]^*
Third year and beyond	0.3358 [0.1419]^*	3.4861 [1.4229]^*	0.0196 [0.0350]	−0.0915 [0.0513]^*	0.2764 [0.0387]^**	0.0726 [0.0403]^*
Observations	318	222	578	578	578	226

	Sample: schools that adopt APIP after 2000 and future-APIP adopters
	log of AP course enrollment	percent 11th and 12th graders taking AB/IB exams	log of graduates	log of SAT/ACT takers	log score above 1100/24 on SAT/ACT	ln attend college
	7	8	9	10	11	12
First year	0.0715 [0.0932]	1.3633 [1.2020]	0.0016 [0.0269]	−0.0494 [0.0593]	0.2383 [0.1020]^*	0.0588 [0.0427]
Second year	0.1011 [0.1230]	3.2194 [1.9485]	−0.0051 [0.0331]	−0.1194 [0.0973]	0.3204 [0.0931]^**	0.0859 [0.0477]^*
Third year and beyond	0.3173 [0.1775]^*	2.5845 [2.3064]	0.0297 [0.0371]	−0.2184 [0.1101]^*	0.5791 [0.1104]^**	0.113 [0.0352]^**
Observations	265	190	483	483	483	190

Robust standard errors in brackets. Standard error clustered at the district level.
+ significant at 10 percent;
↵* significant at 5 percent; ** significant at 1 percent.
Columns 1 through 6 are based on a panel of 57 schools. Columns 7 through 12 are based on 48 schools. All regressions are based on the preferred specification using the sample of APIP and future-APIP schools. All models include school demographic and enrollment variables, school fixed effects, and time fixed effects for each propensity score decile.