Re: st: generate Spell Counter or Duration Variable

[David Ashcraft <ashcraftd@rocketmail.com>]

I am sorry for the confusion: -d- is the dummy variable reflecting change of state from negative to positive (0,1). The final data set would be similar to one appended below.

David


----- Original Message -----
From: Nick Cox <njcoxstata@gmail.com>
To: statalist@hsphsun2.harvard.edu
Cc: 
Sent: Friday, December 7, 2012 8:18:22 PM
Subject: Re: st: generate Spell Counter or Duration Variable

Somebody else may understand this, but I don't think this is complete.
What's -d-, for example?

Nick

On Fri, Dec 7, 2012 at 4:52 PM, David Ashcraft <ashcraftd@rocketmail.com> wrote:
> Hi Statalist,
>
> I wanted to generate a duration variable to determine, how long a firm remained in a specific state. the dataset is panel where T>N. The change in state of the firm is explained by a dummy variable. The duration variable as shown below capture duration of each spell. I thought of using -xi i.d- but it generate the same variable as -d-.
>
> id    date2  d    Duration
> 1     16587  1     1
> 1     16617  1     2
> 1     16646  1     3
> 1     16679  0     0
> 1     16709  1     1
> 1     16740  0     0
> 1     16770  1     1
> 1     16800  0     0
> 1     16832  1     1
> 1     16860  0     0
> 1     16891  1     1
>

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