[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: AW: st: Eliminating patterns from Panel Data

From   Maarten buis <[email protected]>
To   [email protected]
Subject   Re: AW: st: Eliminating patterns from Panel Data
Date   Sat, 19 Jan 2008 22:48:16 +0000 (GMT)

--- Maarten buis <[email protected]> wrote:
> No need to wait for StataCorp. One of the nice things about Stata is
> that you can do it yourself, like in the example below. 

Here is a small update that should be a bit safer (it now uses some
tricks from )

*--------- begin mkbalanced.ado------------------
*! version 1.0.1 MLB 19Jan2008
program define mkbalanced, sortpreserve
	syntax, GENerate(name)
	confirm new var `generate'
	capture xtset
	if _rc == 459 {
		di as err ///
		"panel variable not set, use -xtset varname ...-"
	local panelvar "`r(panelvar)'"
	local timevar "`r(timevar)'"

	tempvar touse nvals
	gen byte `touse' = !missing(`timevar')

	qui levelsof `timevar'
	local t : word count `r(levels)'
	bys `panelvar' `timevar' `touse' : ///
          gen long `nvals' = _n == 1 if `touse'
	bys `panelvar' `touse' : ///
	    replace `nvals' = sum(`nvals') if `touse'
	bys `panelvar' `touse' : ///
	    gen byte `generate' = `nvals'[_N]== `t'
*--------- end mkbalanced.ado------------------

Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

Support the World Aids Awareness campaign this month with Yahoo! For Good
*   For searches and help try:

© Copyright 1996–2024 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index