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st: testing linear combination of means

From   "Rubil Ivica" <>
To   <>
Subject   st: testing linear combination of means
Date   Thu, 22 Nov 2012 14:23:38 +0100

Dear Statalist members:

Suppose there are four variables: var1, var2, var3, var4. I need to test

0.5 * [mean(var1) - mean(var2)] - 0.5 * [mean(var3) - mean(var4)] 

is significantly different from zero.

Is there any idea how to perform the test?

Thanks in advance,

Ivica Rubil
Ekonomski institut || The Institute of Economics, Zagreb
Trg J. F. Kennedyja 7, 10 000 Zagreb, Croatia
tel. +385-1-2362-269 || fax. +385-1-2335-165 ||

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