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st: RE: hotdeck error message, invalid 'and'

From   "Nick Cox" <>
To   <>
Subject   st: RE: hotdeck error message, invalid 'and'
Date   Fri, 20 Jun 2003 09:46:46 +0100

Takahiro Higashi

> I was using the "hotdeck" command that you wrote on STATA. 
> I get a strange
> error of "invalid 'and'". Since it happens when I ran 
> hotdeck, I think it
> comes from the command. The actual output is like below.  
> Does anybody know
> why this happens and/or how to solve it?
> >From previous posting, I tried the following address, but 
> it seems not
> existent any more.
> net from
> ----the output starts here--------------------
> . hotdeck b11, by(gender lths inc risk) store impute(5) keep(id)
> DELETING all matrices....
> Table of the Missing data patterns
>  * signifies missing and - is not missing
> Varlist order: b11
>     pattern |      Freq.     Percent        Cum.
> ------------+-----------------------------------
>           * |         (table omitted)
>           - |
> ------------+-----------------------------------
>       Total |
> invalid 'and'
> ----output end--------

This refers to a command -hotdeck- written by 
Adrian Mander and David Clayton. Adrian no longer works 
at the MRC Biostatistics Unit at Cambridge. 
He now works at GSK:

He appears not to be a member of Statalist at present, 
so I suggest you write to him directly. 

This raises a more general question: how
do I find the authors of user-written programs? 

Various possibilities: 

1. They are active members of Statalist. Their 
email addresses may be apparent from a search 
of recent Statalist postings. 

2. They are members of Statalist, but not 
very active. You can find out who is a member 
of Statalist by emailing 
The details are in the Statalist FAQ. 

3. They are not members of Statalist. Several 
writers of Stata programs are not. Within Stata
-findit- often finds a recent address. (This is how 
I found Adrian's address above.) Otherwise 
there is always the possibility of a search engine. 

Of course, there are all sorts of reasons why 
users do not _necessarily_ maintain support 
for their Stata programs. They are too busy, they switched 
to some other software, as far as they are concerned it 
is superseded or obsolete, etc. 

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