# st: How many statistics can be bootstrapped by one program?

 From Olena Stavrunova To statalist@hsphsun2.harvard.edu Subject st: How many statistics can be bootstrapped by one program? Date Sun, 18 Aug 2002 14:23:53 -0500

```Dear Sirs,
I need to bootstrap a large number of statistics, actually, it is 5
statistics,  calculated for the different year-category groups of the data
set. Up to now I have no luck in obtaining bootstrap estimates for the number
of statistics larger than 4.
I use the following program, which works fine for 4 statistics :
program define jobflo
version 6.0
if "`1'" == "?" {
global S_1 "POS_98 NEG_98 POS_99 NEG_99"
exit
}
local i=1998
while `i'<=1999 {
summarize pos if year == `i'
local bf`i' = r(sum)
summarize neg if year == `i'
local cd`i' = r(sum)
summarize xit if year == `i'
local ef`i' = r(sum)
local gh`i'  = `bf`i' ' / `ef`i''
local jk`i' = `cd`i' '/`ef`i''
local i = `i'+1
}
post `1' `gh1998' `jk1998'  `gh1999' `jk1999'

end

However, if I add one more statistic for calculation so that the program looks
like:
program define jobflo1
version 6.0
if "`1'" == "?" {
global S_1 "POS_98 NEG_98 NET_98 POS_99 NEG_99 NET_99"
exit
}
local i=1998
while `i'<=1999 {
summarize pos if year == `i'
local bf`i' = r(sum)
summarize neg if year == `i'
local cd`i' = r(sum)
summarize xit if year == `i'
local ef`i' = r(sum)
local gh`i'  = `bf`i'' / `ef`i''
local jk`i' = `cd`i''/`ef`i''
local tf`i' = `gh`i'' - 'jk`i''

local i = `i'+1
}
post `1' `gh1998' `jk1998'  `tf1998' `gh1999' `jk1999' `tf1998'

end

I get the Stata message " 'jk1998' invalid name". Please, note, that I added
one more statistic for calculation, which is tf`i' and that 'jk1998' did not
create any problems in the first program. PLease, note also, that in the data
set there are only 4 variables called pos, neg, xit, year
I would highly appreciate, if somebody explains me what can be the reason of
my problem.
Thank you very much.
Olena

Olena Stavrunova
S216 Pappajohn
University of Iowa
Iowa City, IA 52242-1000
(319)335-0494

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```