![]() Perhaps that could be easier for users to understand in later updates. 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. They are often used to measure the prevalence of health outcomes, understand determinants of health, and describe features of a population. 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. Cross-sectional studies are observational studies that analyze data from a population at a single point in time. 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). "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. The main point is that a panel dataset _must_ be organized as stacked time series for use in gretl. maybe it's a bit confusing but in fact it is intended. ![]()
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