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st: Re: one sided test


From   "Christer Thrane" <ch-thran@online.no>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: one sided test
Date   Wed, 15 Mar 2006 21:44:33 +0100

How about:

use "C:\data\auto.dta", clear
(1978 Automobile Data)

. reg price mpg rep78

Source | SS df MS Number of obs = 69
-------------+------------------------------ F( 2, 66) = 11.06
Model | 144754063 2 72377031.7 Prob > F = 0.0001
Residual | 432042896 66 6546104.48 R-squared = 0.2510
-------------+------------------------------ Adj R-squared = 0.2283
Total | 576796959 68 8482308.22 Root MSE = 2558.5

------------------------------------------------------------------------------
price | Coef. Std. Err. t P>|t| [95% Conf. Interval]
-------------+----------------------------------------------------------------
mpg | -271.6425 57.77115 -4.70 0.000 -386.9864 -156.2987
rep78 | 666.9568 342.3559 1.95 0.056 -16.5789 1350.492
_cons | 9657.754 1346.54 7.17 0.000 6969.3 12346.21
------------------------------------------------------------------------------


. test mpg- rep78=0

( 1) mpg - rep78 = 0

F( 1, 66) = 6.46
Prob > F = 0.0134

----- Original Message ----- From: "y erc" <yerceylan@hotmail.com>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, March 15, 2006 9:21 PM
Subject: st: one sided test



Hi

I am regressing y on x1, x2, using "reg" command. I would like to test if b1<b2 (cefficents of x1 and x2) is significant. Can you please help me how I can do this one sided test using stata? I mean is there a command for this?

Thanks

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