Hello all,

I have a question please on how to combine retrospective and prospective information using Stata. I have an observed period of 10 years from 2009-2019 (Wave 1 to 9) in a panel sittings. I also have retrospective variables related to employment history and marital history which has time-invariant values for each person in the observed period (such as; ever married, age at first marriage, age at first job after leaving school, etc.)
These information were collected in Wave 1 and Wave 5. I want to combine these information together and thus use panel data analysis.
Can anyone help me with Stata commands or share any knowledge on hoe this should be done.

Kind regards,
Yara