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Re: st: Heckman with double selection


From   "Srini Sankaraguruswamy" <sankaras@georgetown.edu>
To   <martiaa8@hei.unige.ch>, <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Heckman with double selection
Date   Fri, 05 May 2006 11:06:08 -0400

I had a similiar issue and i used a mlogit

0 if no loan
1 if loan but not rescheduled
2 if loan but rescheduled.

calculate the inverse mills ratio for each of these and then do a two step with equation 3 ols.
curious if the list has a better method to deal with this issue.
srini

>>> martiaa8@hei.unige.ch 5/5/2006 10:15 AM >>>
Hi,

I would like to estimate the amounts of rescheduled debt by debtors in three
stages
1)Get an IMF agreement (probit)
2)Conditional on 1), get the probability of getting a debt rescheduling
(probit/heckprob)
3)Conditional on 2), find how much debt is rescheduled. (OLS)

Now, how do I do that?
I know how to implement 2) conditional on 1). That's heckprob.
I know how to implement 3) conditional on 2). That's heckman.
But I don't know to deal with the three stages/double selection.

Thanks for your help.

Aurelie

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