Doubt using strings

[Eli Hadad]

Dear all

I have to run several regressions like that:

var bm200101 br200101
var bm200102 br200102
var bm200103 br200103

var bm200201 br200201
var bm200202 br200202
var bm200203 br200203

var bm200301 br200301
var bm200302 br200302
var bm200303 br200303

and so on…

I have been trying to do a program like that, but it doesn´t work.
What am I doing wrong? Any help would be appreciated.
Thanks

local y2001 = "2001"
local y2002 = "2002"
local y2003 = "2003"

local m1 = "01"
local m2 = "02"
local m3 = "03"

forvalues j=2001/2005{
forvalues k=1/5{
var bm`y`j'' `m`k'’ br`y`j'' `m`k'’

}
}

[Andrew Musau]

You can use display to see what you are doing wrong. In this case, enclose text in quotes

forvalues j=2001/2005{
forvalues k=1/5{
di "bm"`j' "m"`k' "br"`j' "m"`k'
}
}

[Eli Hadad]

Andrew, when i use display it looks like correct but when i run as a regression it points me an error. That´s my doubt: what´s wrong in mhy dreferencing??

[Nick Cox]

I think this is all you need.

forval y = 2001/2003 { 
    forval j = 1/3 { 
        var bm`y'0`j' br`y'0`j' 
    }
}

[Eli Hadad]

Thanks Nick !