1. I am trying to follow the same youth from Wave 1 (12-17years old) to Wave 2 (13-18 years old). In this case, I understand that I will need to merge Youth W1, Youth W2, and Adult W2 (for aged-up youth) files. In doing so, is it accurate that I should use PERSONID to match respondents in youth file at Wave 1 with the same respondents in adult file who aged up at Wave 2?
2. In other words, is PERSONID consistent across different files? such that youth who has PERSONID of 123 at Wave 1 is the same person as an adult with PERSONID 123 at Wave 2?
3. Also, after merging them (Youth W1, Youth W2, and Adult W2), which survey weight should I use?
Thank you so much for your help!