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Re: st: RE: Re: How to calculate this conditional mean


From   "Quang Nguyen" <quangn@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: Re: How to calculate this conditional mean
Date   Tue, 31 Oct 2006 15:17:23 -1000

Thanks to Nick's  excellent support,  I have found the solution.

On 10/31/06, Nick Cox <n.j.cox@durham.ac.uk> wrote:
See the FAQ

How do I create variables summarizing for each individual
properties of the other members of a group?
http://www.stata.com/support/faqs/data/members.html

Nick
n.j.cox@durham.ac.uk

Quang Nguyen

> I have the following data set:
>
> > Vessel                   Date  of landing                  Revenue
> > 1                           July/05/2004
> > 2
> > 3
> > .....
> >
> I would like to create a variable whose value is the average revenue
> of all other vessels having the same date of landing. For instance,
> for vessel 1, this variable will be the average revenue of all other
> vessels (not including vessel 1) whose date of landing is
> July/05/2004.

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