st: Filling in gaps in time variable

["Mike Kim" <argonomos@gmail.com>]

Dear Statalisters,

I have a question about tsfill. My data look like this:

week  rev  title country
1      992   A     P
2      182   A     P
4      221   A     P
1      258   A     Q
2      278   A     Q
3      293   A     Q
5      336   A     Q
7      342   A     Q

I tried "tsset  title week" to use tsfill, but Stata says "repeated time 
values within panel". "tsset  country week" gives the same error message 
because week is repeated within a country, too. I want to fill missing weeks 
like the following. Is there any way to do this?

week  rev  title country
1      992   A     P
2      182   A     P
3      221   A     P
4      221   A     P
1      258   A     Q
2      278   A     Q
3      293   A     Q
4      336   A     Q
5      336   A     Q
6      342   A     Q
7      342   A     Q

Thank you for your help in advance.
Mike.

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