An official website of the United States government

The .gov means it's official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site.

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Bureau of Labor Statistics > National Longitudinal Surveys > Data > NLS Sample Retention

Sample Retention and Reasons for Non‐Interview

**Sample Retention**
Cohort	Round	Total Sample Interviewed	Retention Rate (%)	Description
NLSY97	Round 19	6,947	77.3	Retention rate is calculated by dividing the number of respondents interviewed in Round 19 by the number of respondents first interviewed in Round 1 (1997). The number of respondents eligible for the interview (including deceased respondents) was 8,984 beginning in Round 1 (1997). This table provides Retention Rates in the NLSY97 by sample types and gender for all rounds.
NLSY79	Round 28	6,878	69.0	Retention rate is calculated by dividing the number of respondents interviewed by the number of respondents remaining eligible for interview. All 1979 (round 1) respondents including those reported as deceased are eligible for interviews, with the exception of those who have been permanently dropped from the sample. In the round 28 (2018) survey, 6,878 civilian and military respondents out of the 9,964 eligible were interviewed, for an overall retention rate of 69.0 percent. This table provides Retention Rates in the NLSY79 by sample types for all rounds.

**Reasons for Noninterview**
Cohort	Round	Total Not Interviewed	Refusal	Deceased	Not Locatable	Others
NLSY97	Round 18	2,037	1,458	231	236	112
NLSY79	Round 28	5,808	933	1,033	780	3,062

This table provides reasons for noninterviews in the NLSY97 by sample types for all other previous rounds.
This table provides reasons for noninterviews in the NLSY79 by sample types for all other previous rounds.

Last Modified Date: March 23, 2022