Table A1.

Baseline Characteristics by Survey Response Status.

	Answer	Don't		First	Multiple
	Survey	Answer	p-value	Response	Attempts	p-value
Male	0.46	0.49	0.131	0.46	0.46	0.786
Female	0.54	0.51	0.131	0.55	0.54	0.786
Age	15.9	15.9	0.757	15.9	15.9	0.247
Lowest Wealth Quartile	0.24	0.32	0.000	0.23	0.27	0.058
Second Wealth Quartile	0.23	0.23	0.867	0.24	0.21	0.175
Third Wealth Quartile	0.26	0.23	0.042	0.27	0.24	0.215
Top Wealth Quartile	0.26	0.23	0.063	0.26	0.27	0.480
Mother's education: high school or less	0.45	0.51	0.005	0.45	0.45	0.963
Mother's education: beyond high school	0.55	0.49	0.005	0.55	0.55	0.963
Mestizo or White ethnicity	0.84	0.74	0.000	0.85	0.83	0.247
Indigenous/Afro-Ecuadorian/Montubio/Mulatto/Other	0.16	0.26	0.000	0.15	0.18	0.247
Pichincha Province	0.69	0.56	0.000	0.71	0.64	0.012
Napo Province	0.10	0.16	0.000	0.09	0.12	0.166
Orellana Province	0.21	0.28	0.000	0.20	0.24	0.066
Student has phone number in baseline	0.78	0.78	0.600	0.79	0.77	0.223
Father has phone number in baseline	0.14	0.17	0.187	0.14	0.15	0.874
Mother has phone number in baseline	0.18	0.15	0.108	0.18	0.19	0.732
Grade 10	0.35	0.43	0.000	0.36	0.34	0.669
Grade 11	0.38	0.36	0.266	0.38	0.38	0.927
Grade 12	0.27	0.21	0.002	0.26	0.28	0.574
Only speaks native language	0.06	0.05	0.313	0.06	0.05	0.196
Sample Size	1552	860		1083	469

Notes: Wealth Quartiles are based on the first principal component of ownership of seven household assets measured at baseline; Pichincha Province is the more urban province, while Napo and Orellana are more rural. P-values are from t-tests of equality of means for those who answer the survey versus those who don’t answer the survey (column 3), and for those who answer the survey on the first attempt to contact them, versus answer the survey only after multiple attempts (column 6).