Thank you very much for your answer. I would like to do a cohort
period analysis. I thought about putting an indicator for the year of
entry, but it seems too simplistic to me.
2016-10-12 19:18 GMT+01:00 'Jonathan Bartlett' via Missing Data
<
missin...@googlegroups.com>:
> Hi Lydia
>
> In this situation the missingness is by design, which is a good thing in the sense that you know how the missingness comes about. How you handle the fact the individuals were only in the cohort for a portion of the total time I think will depend on what analysis you want to run. E.g. Do you want to run an analysis on the calendar time scale across the whole cohort period? Or an analysis on the time scale where time zero is when the individual joined the cohort.
>
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