attregtest: new command on SSC to test for attrition bias in field experiments

[Karen Ortiz-Becerra]

Dear Statalisters,

Dalia Ghanem, Sarojini Hirshleifer, and I are excited to announce our new package attregtest. This command implements the regression-based attrition tests we propose in the paper “Testing Attrition Bias in Field Experiments”. For more details, see the working paper: https://escholarship.org/uc/item/4ck087v3

The program can be installed from SSC by typing the following in the Stata command window:

ssc install attregtest, replace

Once installed, you can read the help file with:

help attregtest

The help file provides a few examples of how to use the command and the output table it produces. You should have the commands esttab and randtreat installed in order to run these examples. The lowest version of Stata required to run this routine is Stata 13.

We hope you give it a try and welcome any feedback you may have!

[Karen Ortiz-Becerra]

Dear Statalisters,

I’m pleased to announce a new version of the attregtest package to implement the attrition tests we proposed with Dalia Ghanem and Sarojini Hirshleifer in the paper “Testing Attrition Bias in Field Experiments.” You can find the paper here: https://jhr.uwpress.org/content/earl...r.0920-11190R2

This new version of the package has a new syntax that allows for the inclusion of covariates in the tests that are either determinants of (or proxies for) the outcome of interest. We describe these changes in the help file and use simulated data to illustrate how to use the command for completely and cluster randomized experiments as well as experiments that are stratified.

This new version of the program can be installed from SSC by typing the following in the Stata command window:

ssc install attregtest, replace

Once installed, you can read the help file with:

help attregtest

We hope you give it a try!