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st: RE: how to delete some observations
Is this more complicated than
. drop if price == .
> I had a data on market participation of households. The number of
> times each household participates in the different markets varies
> between the households. When I have reshape the data into a long
> format the data became as follows:
> ID market choice price
> 1 a1 0 .
> 1 f1 0 .
> 1 s1 1 x
> 1 u1 0 .
> 1 a2 0 .
> 1 f2 0 .
> 1 s2 0 .
> 1 u2 0 .
> 2 a1 1 x
> 2 f1 0 .
> 2 s1 0 .
> 2 u1 0 .
> 2 a2 0 .
> 2 f2 0 .
> 2 s2 0 .
> 2 u2 1 x
> So from the sample, household 1 traded only one time and
> household 2 traded twice. What I would like to is hence household
> 1 traded only once, I need to delete the second set of observations
> for this household making no changes to the observations of
> household 2.
> I have tried to do various options, but they did not work. I would
> appreciate any help.
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