Alternative definitions of program eligibility
In our primary impact analysis, we considered a student to have become eligible for
receiving services for New Heights after having given birth, and we included pregnant students
in the nonparenting group. However, New Heights services are also offered to pregnant students
(Chapter III). We therefore conducted sensitivity analyses that estimate the effect of New
Heights expansion on students who have passed the first, second, and third trimester of
pregnancy. The impacts on unexcused absences per semester, excused absences per semester,
and credits earned per year remain significant in each of these three analyses (Table C.3). The
impact on days attended is significant among parents past the second and third trimester of
pregnancy and is marginally significant among parents past their first trimester of pregnancy.
The impact on the semester graduation rate is marginally significant among students who have
passed their third trimester of pregnancy and is not significant after the first and second trimester
of pregnancy.
Table C.3. New Heights impacts under alternative definitions of New Heights
eligibility
.
Unexcused
absences
per
semester
Excused
absences
per
semester
Days
attended
per
semester
Credits
earned
per year
Semester
graduation
rate
a
(percentage)
Sample
size
Main analysis results
-4.54***
1.35**
3.43***
1.06***
0.03*
10,760
First trimester of pregnancy
-3.54***
1.48***
2.12*
0.93***
0.02
10,760
Second trimester of
pregnancy
-3.95***
1.47***
2.60**
1.03***
0.02
10,760
Third trimester of pregnancy
-4.64***
1.46**
3.19**
1.07***
0.03*
10,760
Source: DCPS administrative date; DC DOH administrative data.
Note:
All regressions include year fixed effects, semester fixed effects, age indicators, race and ethnicity
indicators, and an indicator for being over-age when entering 9th grade.
P
-values are based on standard
errors made robust to serial correlation within students. Statistical significance is based on a two-tailed t-
test. Statistical significance within the three outcomes in the attendance domain, unexcused absences,
excused absences, and days attended, are based on
p
-values that are adjusted for multiple comparisons
using a Bonferroni adjustment
a
The semester graduation rate is the proportion of students who graduate each semester. The analysis is restricted
to students who are at least 17 years old each semester. The semester graduation rate is a marginal measure of
graduation, whereas the more commonly used cohort graduation rate is a cumulative measure. The semester
graduation rate is lower than the cohort graduation rate.
*Significantly different from zero at the .10 level.
**Significantly different from zero at the .05 level.
***Significantly different from zero at the .01 level.
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