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st: RE: El-Badry correction help


From   Nanlesta Pilgrim <nanlesta@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: RE: El-Badry correction help
Date   Thu, 29 Sep 2011 07:20:40 -0700

Dear Statalist,
I'm sending again in hopes that someone might have an answer.

What am I missing? I am trying to apply the El-Badry correction to census data.

I began by creating a counting variable within each age category (15-49).
Then I did the following:

regress pnsborn pzeroborn  /*restricting the analysis to the first observation*/
predict yhat /*predicted values from the regression model*/

*Produced a scatter plot with regression line added
graph twoway lfit pnsborn pzeroborn || scatter pnsborn pzeroborn

*Compute residuals, create new variable residuals:
predict residuals, resid

*Produce a residual plot by age groups with horizontal line at 0
*Should be no pattern
twoway (connected residuals age3, sort), ytitle(residuals) yline(0)
xlabel(#12, labels valuelabel)

The graph is actually showing a pattern- when there should be none.
What have I either done wrong or failed to add?

Thanks!
Terri



-- 
Nanlesta Pilgrim, MPH, PhD
Post Doctoral Fellow
Department of Epidemiology
Department of Population, Family and Reproductive Health
Johns Hopkins Bloomberg School of Public Health
678-895-2860

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