Hi Statalisters,
That square root diameter was puzzling, but after some "googling" it
seems that the square root of a diameter can be used to compare
binoculars, e.g. magnification * square root of diameter = "Astro
Index". :)
I am also curious about the Hausman test. I am doing an econometrics
paper this semester. I use Stata, and everyone else, including the
lecturer, use SAS. We have been comparing an xtreg fixed effect and a
random effects model. I come out with a Hausman test statistic = 31.75,
and SAS gives 28.35. Is it possible that such a difference can be due to
rounding error, or should this be further investigated? I would
appreciate any comments on this.
Best wishes,
Alexander
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Nick Cox
Sent: Thursday, October 07, 2004 12:03 PM
To: [email protected]
Subject: st: RE: Sqaure root
Other people provided the syntax answer.
Perhaps you just made this example up, but
* in any case I would always recommend
using appropriate variable names. "square"
is not a good name for a square root variable.
* I don't know what meaning is to be attached
to the square root of a diameter.
Nick
[email protected]
[email protected]
> I am a beginning stat major, and I am trying to figure out
> how to command the
> stata program to take the square root of a data set, after I
> have already infiled some data.
>
> I typed:
>
> gen square = sqrt{diameter}
>
> but it doesnt work
>
> it says sqrt not found.
>
> does anyone know the command?
*
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*
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