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From |
Maarten buis <[email protected]> |

To |
[email protected] |

Subject |
Re: st: random effects with truncreg possible |

Date |
Fri, 8 Feb 2008 14:46:40 +0000 (GMT) |

You can see if you can make that model work in -gllamm- downloadable from -ssc-. Hope this helps, Maarten --- Anita <[email protected]> wrote: > I already use xttobit as an alternative, but I also need to estimate > Craggs model as it allows for different explanatory variables in the > selection part and in the regression part. > > Maarten buis schrieb: > > The easiest solution would be to use -xttobit-. > > > > Hope this helps, > > Maarten > > > > --- Anita <[email protected]> wrote: > > > > > >> Dear Statalist Members > >> > >> Sorry for posting again, I learned that I didn't explain my > problem > >> accurately. Sorry for any inconvenience caused. > >> I am currently estimating a model based on Cragg ("Some > statistical > >> models for Limited Dependent Variable with Application to the > Demand > >> of > >> Consumer Goods", 1971) > >> > >> My research topic is to compare the models used in the literature > to > >> explain the allocation of bilateral ODA (official development > >> assistance, so money for development). > >> So there exist countries who do not recieve ODA (value =0) and > others > >> > >> do. I do have data on both. So it is not a typical truncation > >> problem. > >> First there is a selection equation to decide if a country gets > ODA, > >> I > >> estimate this via a Probit Model. (y1=1 if they get ODA) > >> on a second step I estimate for all positive outcomes of the > Probit > >> Model a Regression to estimate how much money they get. > >> > >> As I am working with a panel (different developing countries over > >> time) > >> I would like to do this with random effects. For Probit there > exists > >> a > >> xtprobit command, for truncreg (command for the regressionpart) I > >> didn't > >> find anything. > >> Is there a possibility to do this? > >> As I indicated above, I have to compare the models used in the > >> literature, so I have to do Cragg's Model preferably with random > >> effects > >> so I can compare with other models. > >> > >> As a second question: is there a better way to solve the problem > as > >> with > >> truncreg? As I know, the studies used this, but it does not seem > to > >> fit > >> very well > >> > >> thanks a lot > >> Anita > >> > >> > >> > >> > >> > >> * > >> * For searches and help try: > >> * http://www.stata.com/support/faqs/res/findit.html > >> * http://www.stata.com/support/statalist/faq > >> * http://www.ats.ucla.edu/stat/stata/ > >> > >> > > > > > > ----------------------------------------- > > Maarten L. Buis > > Department of Social Research Methodology > > Vrije Universiteit Amsterdam > > Boelelaan 1081 > > 1081 HV Amsterdam > > The Netherlands > > > > visiting address: > > Buitenveldertselaan 3 (Metropolitan), room Z434 > > > > +31 20 5986715 > > > > http://home.fsw.vu.nl/m.buis/ > > ----------------------------------------- > > > > > > __________________________________________________________ > > Sent from Yahoo! Mail - a smarter inbox http://uk.mail.yahoo.com > > > > * > > * For searches and help try: > > * http://www.stata.com/support/faqs/res/findit.html > > * http://www.stata.com/support/statalist/faq > > * http://www.ats.ucla.edu/stat/stata/ > > > > > * > * For searches and help try: > * http://www.stata.com/support/faqs/res/findit.html > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > ----------------------------------------- Maarten L. Buis Department of Social Research Methodology Vrije Universiteit Amsterdam Boelelaan 1081 1081 HV Amsterdam The Netherlands visiting address: Buitenveldertselaan 3 (Metropolitan), room Z434 +31 20 5986715 http://home.fsw.vu.nl/m.buis/ ----------------------------------------- __________________________________________________________ Sent from Yahoo! Mail - a smarter inbox http://uk.mail.yahoo.com * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

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