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st: use of local in variable name

From   Eric Sommer <[email protected]>
To   [email protected]
Subject   st: use of local in variable name
Date   Mon, 19 Sep 2011 12:56:54 +0200

Dear Stata-Users,

I want to program a job market simulation that matches employers and job-searchers according to their match. Employers receive up to ten job offers. If they have less than 10, I would like to save the firm's number in the respective variable offer_`x' (x from 1 to 10).
the code looks as follows:
forvalues s=1/$numberofjobs {
    if free[`s'] == 1{    // is the job free

// scalar c contains the index of the employer that matches best

     if (offers[c] < 10) {

        replace offers = offers + 1 if (_n == c)
        local x offers[c]
replace offer_`x' = `s' if (_n == c) // Applicant c gets job offer number x from firm s

However, offer_`x' is not assigned correctly. I get the following error code:

variable offers_offers not found

But if I inspect the content of x with "di`x'", I get 1 as return (if ang[c] is 1)

On the contrary, if I type this, the variable is replaced correctly.
local x 1
replace offer_`x' = `s' if (_n == c)

Apparently, Stata interprets `x' differently when using "display" or "replace". What am I doing wrong? Or is there another way to replace offer_1 to offer_10 without this detour using locals?

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