'pandas- label firm panel
I have a panel of firms, and I want to do the following. Based on some conditions, I want to create a column with labels for each firm. See an example:
I want for each different firmid, if RDCAP is nan for all of the year range, to be classified as an EXP or else as a CAP. The issue is, that when I try to do this, it classifies firms as EXP if for a single year they have RDCAP equal to nan.
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