Week 1 – Lecture 2 – Data Management Slides - University of Essex
Week 1 – Lecture 2 – Data Management Slides - University of Essex
Week 1 – Lecture 2 – Data Management Slides - University of Essex
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‘Long’ File Format• Often multiple rows percase/individual• Observations on a variable fordifferent time periods (ordates) held in extra rows foreach individual• Case-row identifier identifiestime (e.g. PID, wave)• The long file format is the bestway to combine data from thesame file across wavespid wave wage10001 1 7.210001 2 7.510001 3 7.710002 1 6.310002 3 6.310003 1 5.410003 2 5.4… …<strong>Data</strong> missing for wave 2
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