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st: global variable in a loop


From   Amit Khandelwal <khandelwal.amitk@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: global variable in a loop
Date   Tue, 17 Aug 2004 18:15:26 -0400

I have the following code:
	global S_1 "S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13"
	global S1=1.1
	global S2=1.2
	global S3=1.3
	global S4=1.4
	global S5=1.5
	global S6=1.6
	global S7=1.7
	global S8=1.8
	global S9=1.9
	global S10=1.432
	global S11=1.243
	global S12=1.3421
	global S13=1.412
	capture drop index
	gen index=.
	forvalues j=1/13 {
                 bysort destination year: replace
index=sum(prices^(1-$S`j')) if `j'==d2
	}
d2 is a variable that takes values 1-13. So, if d2=4, I need it the
corresponding prices raised to 1-$S2. However, Stata instead makes
$S`j'=1 for all j, so my price variable is being raised to the 0
power. Does anyone know what is wrong with my code?

Thanks,
Amit
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