Hello,
I am stumped on a coding problem. I am measuring the treatment effect on each of multiple outcomes over each of multiple treatments for each of multiple groups in my data set. I am using the canned teffects commands. Unfortunately, some groups have perfect predictors included for some variables, but others do not for those same variables. For each group I want to include as many covariates as possible from the full set. Further, my data set will be updated periodically and bins that are currently 0 may become non-zero in the future (so I need code that is dynamic enough to pick up on the changing data with each future iteration). The problem is that teffects outs when a perfect predictor is included, rather than omitting that variable. So, I want to create a loop that will
1. preserve the data
2. run the logit model with full set of covariates, many of which are categorical factor variables
3. detect perfect predictors from #2
4. run teffects while omitting perfect predictors detected in #3
5. restore the data
I'm good with 1,2,5, but I don't know how (or if there's a way) to code 3-4. Any help on this is greatly appreciated
On a side note, I understand why teffects outs when including perfect predictors and I tend to agree with the reasoning for balanced data sets and one-off runs of teffects. But my situation is a little different. To this end, I have sent a technical request to Stata to include a non-default option to run the model while omitting perfect predictors and providing a note in the output to that effect, as happens elsewhere in Stata.
Michael
Related Posts with teffects loops, inconsistent covariate coverage, and perfect predictors
dataset structure for cluster samplingi want to select 800 clusters from a listing of 2000 enumeration areas. my sampling strategy is syst…
Help with TVDIFF/ plotting time-varying treatment effects?Hi all, I have a case where the treatment is binary and varies over time. I am trying to use the us…
Recoding into another variableI am at a loss here and would be grateful for any help: I have a string variable "Other-specify." S…
Post hoc analyses after multi-nominal regressionHello, I have a dataset with a categorical outcome variable (strategy) that includes four groups. I…
odbc load throwing error for long SQL queryI am trying to download data from a read-only database using odbc load, exec(). My SQL query is gene…
Subscribe to:
Post Comments (Atom)
0 Response to teffects loops, inconsistent covariate coverage, and perfect predictors
Post a Comment