lalonde is an oft-used data frequently used for in statistical software packages. This data was drawn from the PSID and National Supported Work Demonstration.
Subsamples of the dataset are included with the R language's
I am using the data from these packages, yet I note that while one of the variables --
treat is defined as
"the treatment assignment (1=treated, 0=control)."
it doesn't actually seem to say what the treatment was.
Can anyone help me determine this?