Dear All
I am getting an error message I thought someone might help me to fix. I
am fitting a linear model on survey data and have issued the following
commands and got the following error message:
svyset [pweight= gswgt3_2], strata (region) psu ( psuscid)
pweight: gswgt3_2
VCE: linearized
Strata 1: region
SU 1: psuscid
FPC 1: <zero>
svy: regress distress llight lmed ldark lblack aalight aamed aadark
aablack
(running regress on estimation sample)
<istmt>: 3499 _robust2() not found
Mata run-time error
r(3499);
end of do-file
r(3499);
I don't have a variable called _robust2 () in my data.
Thanks so much for your assistance.
Winfred
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Nick Cox
Sent: Tuesday, July 05, 2005 6:26 PM
To: [email protected]
Subject: st: RE: (Moving Maximum in Unbalanced panel) Max of a variable
in the last 12 months?
. ssc desc mvsumm
Nick
[email protected]
Sergio Correia
> I'm trying to generate a variable "Y" that is the maximum value of
> another one (lets call it "X") in the last 12 months.
>
> Now, I'm using an unbalanced panel, so I think I need to use
> a "by id:" command.
> I have already set the time series and the panel identifiers ("date"
> and "id"), so I can use the lag and difference operators to take
> account of the nature of the panel.
>
> My problem is that I need the maximum value with respect to every
> month and every id.
> Previously, I needed to calculate the maximum value in the last 12
> months, with respect to the last date of the panel (2004m12). So I
> just did a drop "if date<2004m1"
>
> But now I need to calculate the max. for every month.. that is, the
> **moving maximum, for each ID, taking into account the unbalancedness
> of the panel**.
>
> Any ideas? I'm kinda stuck here =) Thanks a lot!
>
> PS: I'm using StataSE 8
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