Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Timing of TLT Survey Waves and Sample Attrition
| Wave | Time Period | Total Random Sample N (% of W1 Sample) |
Subsample: In School at Wave one N (% of W1 Subsample) |
|---|---|---|---|
| 1 | June to August, 2009 | 2,045 (100%) | 843 (100%) |
| 2 | October to December, 2009 | 1,952 (95%) | 814 (97%) |
| 3 | February to April, 2010 | 1,895 (93%) | 777 (92%) |
| 4 | June to August, 2010 | 1,855 (91%) | 757 (90%) |
| 5 | October to December, 2010 | 1,752 (86%) | 709 (84%) |
| 6 | February to April, 2011 | 1,708 (84%) | 686 (81%) |
