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st: graph with indicator variables


From   "Tsankova, Teodora" <TsankovT@ebrd.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: graph with indicator variables
Date   Thu, 28 Feb 2013 16:54:28 -0000

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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