[Limdep Nlogit List] Request help on conditional logit model with selection

[George joseph]

Hello all,
   
  I would like to request help from the group on the following problem I have.
   
  I would like to estimate a conditional logit model controlling for the selection bias. So the selection equation is a conditinal logit and the outcome equation also is a conditional logit. 
  1)Is this feasible? I could not find any reserch papers addressing a problem like this.
   
  Are thee any papers on this?
  If this is possible, can I do that in NLOGIT?
   
  I would appreciate any help  or thoughts in this regard.If there are any other alternative methods to handle this problem, please let me know.
  Thanks.
  George 

       
---------------------------------
Tonight's top picks. What will you watch tonight? Preview the hottest shows on Yahoo! TV.