Collected Dataset / WLS_1975_Sibling

• United States of America

• Specific population

• Other specific population :

  Siblings of the graduate sample.

The sample frame for siblings for 1975 was a 1/3 random sample of one random living sibling for each graduate with a sibling. The 1993 eligible sibling sample excluded siblings who were in the 1975 sample frame, but were not interviewed; siblings of graduates not interviewed in 1975; and interviews not completed owing to lacking funds. The 2004 eligible siblings sample excluded siblings who were in the 1975 and/or 1993 sample frame, but were not interviewed and siblings of graduates not interviewed in 1975 and 1993.

1975: Mail survey: 2133 participants

1993: Phone and mail survey: 5365 participants

2004: Phone and mail survey: 4703 participants

2011: In-person and mail survey: 3397 participants