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Re: st: Re:Two hurdle models


From   [email protected]
To   [email protected]
Subject   Re: st: Re:Two hurdle models
Date   Fri, 4 Jan 2008 20:02:08 -0500

Thanks a lot, Wilner. This is most helpful.  I thought that the two-hurdles
models have to be estimated jointly, but with independent estimation, Stata
commands should suffice. Thanks again!

Best regards,
Branko





Development Research, World Bank
Email: [email protected] or branko_mi@yahoo.
tel: 202-473-6968
World Bank, Room MC 3-581
1818 H Street NW
Washington D.C. 20433

For "Worlds Apart" see
http://www.pupress.princeton.edu/titles/7946.html

Website:
http://econ.worldbank.org/projects/inequality

For papers see also:
http://econpapers.hhs.se/
http://papers.ssrn.com/sol3/cf_dev/AbsByAuth.cfm?per_id=149002


                                                                                
             "P. Wilner Jeanty"                                                 
             <[email protected]                                                
             >                                                               To 
             Sent by:                    [email protected]         
             owner-statalist@hsp                                             cc 
             hsun2.harvard.edu                                                  
                                                                        Subject 
                                         st: Re:Two hurdle models               
             01/04/2008 07:39 PM                                                
                                                                                
                                                                                
              Please respond to                                                 
             statalist@hsphsun2.                                                
                 harvard.edu                                                    
                                                                                
                                                                                




On Jan 3, 2008 12:01 PM,  <[email protected]> wrote:
> Does anyone knows if there is a program to estimate Cragg's two-part model
which
> I understand is very similar to Heckman's? I found a dhurdle.ado on the Web
> (created by J. Fennema) but  the program does not seem to have ever been
> completed (and used), and there is no .hlp file. So, I hope something better
> must exist...or it does not?
>
> Thanks a lot.
>
> B. Milanovic

I am not aware of anything available other than what B. Milanovic
mentioned. However, he may need nothing more than the official Stata
commands to estimate the Cragg's model. The Cragg's model is a two
stage model where in the first stage one estimates a dichotomous model
that determines whether an individual participates in the market. In
the second stage, a truncated model is estimated based on the
assumption that when the individual participates in the market it will
consume or demand positive values (of goods or services). The original
Cragg's model was estimated with a probit and a truncated normal
[Stata does both]. However, the idea works for any dichotomous choice
model and any truncated model [Stata is also good at most, if not all
of these] if the two models can be estimated independently. B.
Milanovic will need to determine whether the two decisions he's
dealing can be separated or not. Bockstael, Strand et al. (1990) [Land
Economics, issue 66, pp. 40-49] find that when the researcher deems it
necessary to separate the two decisions, the Cragg's model seems to
work best.
--
P. Wilner Jeanty, Post-doctoral researcher
Dept. of Agricultural, Environmental, and Development Economics
The Ohio State University
2120 Fyffe Road
Columbus, Ohio 43210
(614) 292-6382 (Office)
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