Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: st: how to summarize while accounting for duplicate values

From   "Nick Cox" <>
To   <>
Subject   RE: st: how to summarize while accounting for duplicate values
Date   Mon, 22 Feb 2010 11:20:35 -0000

-egen- here is a typo for -gen-. 


Jeph Herrin

If your individuals are identified by the variable -id-,
then create an indicator for one record per -id-:

   bys id: egen first=_n==1

Then all you have to do is condition on -first-

  sum birthday if first

to get summary stats on one record per individual. wrote:

> I am trying to summarize a dataset in Stata 10.1 on individuals' 
> reproductive success throughout their life. The database is set up
> each individual having an annual entry with multiple variables. Some 
> variables' values change annually (e.g. # offspring born), while other

> variables have duplicated values for each year as they do not change 
> over the course of their life (e.g. age of first reproduction, 
> lifespan). How do I get Stata to provide summary statistics for chosen

> variables of interest in the population that accounts for individuals'

> duplicated values for some variables that don't change annually?

*   For searches and help try:

© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index