Logical collection strategy

• Panel collection strategy is logical but leads to complexity
  • Current status recorded
  • If start date after reference date (start of fieldwork last wave) record details of each spell since spell covering reference date
  • Two data files per wave
• Long-term retrospective data collection largely independent of panel
  • Disjoint because of pressure on questionnaire length
  • Wave 2 employment status history (BLIFEMST)
  • Wave 3 occupational history (CLIFEJOB)
• A double problem:
  • How to integrate with panel histories
  • How to integrate with each other