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st: finding the optimum number of lags

From   Ozgur Ozdemir <>
To   Stata <>
Subject   st: finding the optimum number of lags
Date   Mon, 7 Oct 2013 16:25:56 +0000


I have a large panel data with coy_id (company Id), and year as index and unique.

when I run 

varsoc tobin_q sales

it is giving me the 

"repeated time values in sample" error.

However, when I export the data into excel although it is unbalanced I do not have dublicate company and year information. any idea why it might happen ?

thanks, Ozgur 		 	   		  
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