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Re: st: Duration setup


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Duration setup
Date   Thu, 24 Nov 2011 16:57:50 +0000

Your examples don't convey a consistent picture of what you want, but

1. look at the help for -collapse-.

2. note that adding observations with summaries of other observations
usually makes any subsequent analysis much more difficult; it's a
spreadsheet idea that fits badly with statistical software.

Nick

On Thu, Nov 24, 2011 at 4:45 PM, M Martin <statmartin44@gmail.com> wrote:

> I am trying to work out a solution to how I can arange my data in a
> way that can be used in duration analysis.
> Let me show you a example of the data:
>
> newid year var1var2 var3
> 1185039 2007 4254 39673 1565
> 1185039 2008 9456 102467 2076
> 1185039 2009 2275 24896 954
> 1651511 2001 15246 123543 69
> 1651511 2002 4014 30273 43
> 1651511 2003 5670 44057 27
> 1651511 2004 5400 42207 19
> 1651511 2005 1386 10543 6
> 1651511 2006  missing
> 1651511 2007  missing
> 1651511 2008   missing
> 1651511 2009 7056 46650 5
> 1651514 2001 640 2756 4
> 1651514 2002 26024 120328 15
> 1651514 2003 10608 66060 32
> 1651514 2004 20836 122172 29
> 1651514 2005 49117 254606 92
>
> As you can see there is some missing values (for var1-var3) for some
> of the years for the ID 1651511. For the ID 1651511 I want to have one
> observation for the years 2001-2005 with the sums and means for
> var1-var3 and a count of the number of years, Then I want one obs with
> the same info for 2009. For the ID 1185039 I want one obs for
> 2007-2009 with the same info as for the previous mentioned ID.
> Can anyone point me in the right direction of how to write a program
> that does this for many different ID's? I tried searching the
> FAQ/archives, but couldn't find any match.

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