Software for Statistical Methodological Research

by

Paul Rathouz

Last posting: 25 September 2009

• Schildcrout JS, Rathouz PJ. Longitudinal studies of binary response data following case-control and stratified case-control sampling: Design and analysis. To appear in Biometrics.
  
  Stata functions: Stata ado file. Stata help file. (posted 22 January 2009)
  
  
• Rathouz PJ, Van Hulle CA, Rodgers JL, Waldman ID, Lahey BB. (2008). Specification, testing, and interpretation of gene-by-measured-environment interaction models in the presence of gene-environment correlation. Behavior Genetics, 38, 301--315.
  
  Scripts and supplementary technical materials.
  
  
• Stata functions (ado files) for longitudinal data analysis
  
  For each of these files, download the *.ado file and the *.hlp file. I recommend using "Save As Source" when you save them to your hard disk from your web browser.
  
  To use the *.ado files, put them in your current directory, in your stata "ado" directory, or in a directory where Stata will know where to look for them.
  
  These are *not* thoroughly tested functions! Please let me know of any bugs that you find in these functions.
  
  

  • ksmapprox: Faster function to generate smooth model fits
    ksmapprox.ado ksmapprox.hlp
  
    
  • autocor: Function to compute sample autocorrelation function for fixed time points of equal lag
    autocor.ado pdf help file
    Credit: This function was written by Dr. Elizabeth Garrett at Johns Hopkins University
  
    
  • xtgraph: Function for making plots of means over time
    xtgraph.ado xtgraph.hlp pdf demonstration file Credit: This program was written by Paul Seed. I swiped it from the following archive of Stata programs: [website]
    
  
    
  • xtsumcorr: Corrected within and between variance estimation (new on 04 October 2005)
    xtsumcorr.ado xtsumcorr.hlp
    This program requires xtdiff.ado
  
    
  • variogram: Variogram plot (new on 04 October 2005)
    variogram.ado variogram.hlp
    This function requires xtdiff.ado and ksmapprox.ado (described above).
  
    
  • acf: Autocorrelation function and correlogram (new on 03 October 2006)
    acf.ado acf.hlp
    This function requires xprsum.ado