Hello all,
I have a dataset from which I have to sample. For each observation
("ID" in table below), there are multiple rows. And the number of rows
is irregular per ID. My problem: I want to be able to sample ID's from
the dataset. Say the dataset has 3 ID's like the following:
ID x y var1 var2
001 3 4 5 3
001 3 5 7 6
001 4 5 2 3
002 2 4 1 5
003 1 2 9 11
003 1 3 6 2
003 1 4 9 5
003 2 3 10 2
003 2 4 7 4
003 3 4 6 12
If I sample 1 ID and get #001, I want to get all of #001's 3 rows. Of
course, I am aware of the working man's solution: collapse by(id),
sample, merge back to original, keep _merge==3. But this seems
inefficient. I've searched the Statalist and "search sample" in STATA
8, but to no avail. Is there not an easier way to do what I need?
Thanks in advance,
Chihmao
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