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Re: st: AW: Keeping variable After restore

From   "C.T. Shehzad" <>
Subject   Re: st: AW: Keeping variable After restore
Date   Mon, 09 Nov 2009 16:03:35 +0100

Dear Martin:

Thanks for your reply. However, stata says "option if not allowed". It has happened before as well that conditionals do not work as option.

factor wbq91-wbq93, factors(1) if year == 2005
option if not allowed

Thanks again and best regards,


Martin Weiss wrote:
Instead of -keep-ing the year 2000:

webuse bg2, clear
gen year=2000*(_n<200)+ /* */ 2001*(_n>=200) qui factor bg2cost1-bg2cost6 /* */ if year==2000
predict var1

and off you go...


-----Ursprüngliche Nachricht-----
[] Im Auftrag von C.T. Shehzad
Gesendet: Montag, 9. November 2009 15:22
Betreff: st: Keeping variable After restore
Dear Stata-listers:

I want to generate a variable during (preserve - restore) and want to use that after restoring the data. When I will restore data the variable will be dropped automatically. How can I keep the variable?

The data is time series and a simple version of my program is as follows:

keep if year == 2000
factor x1 x2 x3
predict var1

gsort -year
replace var1= var1[_n-1] if var1 >= .
xtset country year
xtreg dep var1 controls

The problem in this program is that after restoring the data I will not have var1 anymore. What can be a possible solution?

Thanks and best regards,


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Choudhry Tanveer Shehzad (Tanveer)
PhD Student
Department of Finance,
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University of Groningen,
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