st: loop over variables using arch

[Moo Hwan Kim <kmhlmj2@hotmail.com>]

Dear Statalisters
 
I would like to know what's wrong with the following message.
 
foreach x of varlist win1-win122{
      arch 'x' l.'x', arch(1)
 
' invalid name
r(198);
I attempted to run arch model for each of rolling windows, which is 122.
Could you tell me what it goes wrong?
 
Any comments would be appreciated.
thanks a lot
 
moohwan kim
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