st: impute with draws from random distribution

[D-Ta <altruist81@gmx.de>]

Dear All,

I am looking for a convenient solution to the following problem. That is 
the type of the sample I am working with:

id 	x1 	x2 	participant 	programm 	time to participation
1 	5 	23 	1 	1 	3.5
2 	6 	42 	1 	2 	5.7
3 	73 	7 	0 	. 	.
4 	35 	2 	0 	. 	.
5 	5 	6 	1 	1 	12
6 	34 	34 	1 	1 	3.5
7 	34 	34 	1 	2 	8.1



The sample consists of of individuals (with covariates x1 and x2) who 
can either be participating in programm 1, programm 2, or be 
non-participants. The non-participants are my controll group. One of the 
control variables that I would like to condition on in a subsequent 
matching step is time to participation. By definition, time to 
participation is not observed for the non-participants. Hence, I would 
like to create hypothetical values in that variable for the group of 
non-participant. It is standard in the literature to randomly draw from 
the distribution of the participants.

Since there are two groups of participants, there are also two different 
distributions in the start dates. I would like to assign two values in 
the time to participation to each non-participant (hypothetical time to 
participation in programm 1 and hypothetical time to participation in 
programm 2)

Any suggestions how to do this??

Best,

Darjusch


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