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Re: st: graph with indicator variables


From   Nahla Betelmal <nahlaib@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: graph with indicator variables
Date   Thu, 28 Feb 2013 17:42:18 +0000

Thanks again, but I want to produce one graph for S, I want to show
that S increases sharply in T-1 relative to T0 and T+1. I have seen
such graph in a journal paper, so it has been done, and I assume there
is a command in Stata to do it. the question is which one? I would
appreciate it highly if anyone help please.

Many thanks

Nahla

On 28 February 2013 17:19, Tsankova, Teodora <TsankovT@ebrd.com> wrote:
> What your command would basically do is produce three separate graphs of
> S.
>
> What I did with stripplot is make a simple time trend of events so my
> command was:
>
> Stripplot date, over(village)
>
> This way I got time trends for events separate for every village (where
> I knew what the three events represented for example).
>
> Hope this helps but what you are trying to do might be different as
> well. Stripplot allows to graph a single variable so in my case I have
> no y.
>
> You might try with tsline as well for plotting time series data.
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nahla
> Betelmal
> Sent: 28 February 2013 17:12
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: graph with indicator variables
>
> Thanks Tsankova , but can you please give me more details. I tried
> stripplot but I got an error message as below.
>
>
> stripplot S over(  T_1 T0 T1 )
> time-series operators not allowed
> r(101);
>
> Thanks again
>
> Nahla
>
> On 28 February 2013 16:54, Tsankova, Teodora <TsankovT@ebrd.com> wrote:
>> I have actually done something similar or a time trend for event using
>
>> the -stripplot- command.
>>
>> -----Original Message-----
>> From: owner-statalist@hsphsun2.harvard.edu
>> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nahla
>> Betelmal
>> Sent: 28 February 2013 16:50
>> To: statalist@hsphsun2.harvard.edu
>> Subject: st: graph with indicator variables
>>
>> Dear Statalist,
>>
>> I want to graph the trend of a numerical variable S around a certain
>> event for different  firms. For each firm the event occurs in a
>> different year, so I generated an indicator  variable equal 1 for the
>> event year in each firm and called it T0 which could be year 2003 for
>> firm 1 but year 2008 for firm 2 , etc. I also generated an indicator
>> variable for year T-1 which represents the year preceding the event
>> year for each firm (e.g. would be year 2002 for firm 1, but 2007 for
>> firm 2 ) , and variable year T+1 which represents the years following
>> the event year for each firm ( would be year 2004, but 2009 for firm
>> 2, etc.). I used lag and forward functions for T-1 and T+1.
>>
>>
>> How can graph the trend of variable S around along variables : T0,
>> T-1,
>> T+1. Is it possible to have  the S variable is on the Y-axis while
>> X-axis represents T0, T-1, and T+1 in one graph, and how?
>>
>> Many thanks
>>
>> Nahla Betelmal
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