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 18	6,734	75.0	Retention rate is calculated by dividing the number of respondents interviewed in Round 18 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 27	6,912	69.4	Retention rate is calculated by dividing the number of respondents interviewed in Round 27 by the number of eligible respondents remaining eligible for interview. In the round 27 (2006) survey, 6912 respondents out of the 9,964 eligible respondents were interviewed. Included in the eligible sample are deceased and difficult to field respondents whom NORC does not attempt to contact. 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	2,250	1,287	207	603	153
NLSY79	Round 27	5,774	1,060	915	800	2,999

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: April 24, 2020