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st: error message- invalid syntax

From   samirkc <[email protected]>
To   [email protected]
Subject   st: error message- invalid syntax
Date   Tue, 09 Nov 2004 16:43:50 +0100

dear statalisters,
I am trying to bootstrap the output (icer) of following program and i am writing program for the first time. But whenever i run this program by typing bssamir, it gives four tables of command summarize but at the end there is an error message " invalid syntax". The program goes like this:

program bssamir, rclass
version 8.2
summarize difqol if group == 0
local e0 = r(mean)
summarize difqol if group == 1
local e1 = r(mean)
summarize tcost if group == 0
local c0 = r(mean)
summarize tcost if group == 1
local c1 = r(mean)
return bssamir = (`c1' - `c0')/ (`e1' - `e0')

Please suggest what is wrong with my program. Also, how to run it without any output tables.
Thank you

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