Table A3.

Randomization of accounts into treatment and control groups by month of account opening

Group	February	March	April	Total
Financial education	711	738	809	2,258
Monthly reminder	827	868	900	2,595
Semimonthly reminders	769	801	850	2,420
Control group	890	923	958	2,780
Total accounts	3,200	3,343	3,517	10,053

Notes: We used a stratified randomization design to assign accountholders to the different experimental conditions. Each strata is defined by month of account opening and bank branch. Youth who opened a BCS Tuticuenta account in February, March or April of 2013 in any of the 263 BCS bank branches nationwide were initially eligible to participate in the experiment. A total of 14,788 youth are part of this initial selection. We imposed two additional restrictions on the final experimental sample that jointly eliminate 4,735 accounts from the sample. First, we only included youth accountholders who at the time of account opening registered a personal cellphone number in the account application form (3,442 accounts). Second, among youths with a cellphone, we only included youths who opened a Tuticuenta account in a branch were at least three other youths opened Tuticuenta accounts (1,293 accounts).