Re: [Gretl-users] changing panel data structure

On Thu, 10 Feb 2011, Summers, Peter wrote: > While helping a student sort out a dynamic panel estimation, I > discovered the following. If I take a data set that's organized > as stacked time series, change the structure to stacked > cross-sections, then change it back, the second change isn't > implemented. I get a box saying no changes were made. Is this > intended behavior? Ah, maybe it's a bit confusing but in fact it is intended. The main point is that a panel dataset _must_ be organized as stacked time series for use in gretl. "Stacked cross sections" is not an option for panel data in gretl, it's just a way of saying that your data are currently the wrong way round and need to be fixed. So, if you go to "/Data/Dataset structure" and say that your dataset is stacked cross sections, gretl will reorganize it for you as stacked time series (a "physical" reorganization of the data). Note that if you then go back to the "Dataset structure" dialog your data will initially appear as "Stacked time series", so, naturally, stating that the structure is stacked time series will produce no change. If you want to change the actual data layout back to what it was originally, you have to say that it's stacked cross sections (again), and gretl will reorganize the data in the opposite direction. Allin Cottrell

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