I would like to loop my estimations through an increasing number of
variables, but I am having difficulty undating my varlist.
For example, suppose there were four variable (A B C D) and I wish to
estimate x on y where x is one of the four sets: "A", "A B", "A B C", and
"A B C D".
tokenize "A B C D"
local i = 1
local x = ""
while i<=4 {
local x = `x'+``i''
regress y `x'
local i=`i'+1
}
This program does not work because I can not get x to update. Any ideas?
Ben
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