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st: Making plots with unbalanced panel data


From   sebas nicaise <sebasnicaise@hotmail.com>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Making plots with unbalanced panel data
Date   Fri, 1 Jun 2012 12:49:57 +0000

Dear all,
 
For my research I have to examine the effect of a specific event ( a covenant violation) on firm outcomes. I have a large (unbalanced) panel dataset that contains the following:
 
date gvkey viol leverageratio
1997q1 1004 0 .2264953
1997q2 1004 0 .2233678
1997q3 1004 0 .2172547
1997q4 1004 0 .2416646
1998q1 1004 1 .2937034
1998q2 1004 0 .2650714
1998q3 1004 0 .2510785
1996q4 1013 0 .0101556
1997q1 1013 0 .0057909
1997q2 1013 0 .0042146
1997q3 1013 0 .0040147
1997q4 1013 1 .0032851
1998q1 1013 0 .0034083
 
Where Viol is a dummy variable which indicates 1 if a firm is in violation of a covenant. 
My question is: How can I ask stata to plot firm outcomes (e.g the mean of leverageratio) around a covenant violation, lets say -4 quarters to +4 quarters.
 
Hope someone can point me in the right direction.
 
Thanks,
Sebastiaan  		 	   		  
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