I have a very basic question. The panel set that I am using is identified by hhold and rd. A few of the observations contains the same hhold and rd. For example:
hhold 1
rd 1
hhold 1
rd 2
hhold 1
rd 2
hhold 1
rd 3
I would like to drop the first observation where the hhold and rd are identical. How do I do so?
Thanks in advance,
Jeff Rosen
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