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From |
Richard Williams <Richard.A.Williams.5@ND.edu> |

To |
statalist@hsphsun2.harvard.edu, statalist@hsphsun2.harvard.edu |

Subject |
Re: st: st predicting probabilities after ivprobit |

Date |
Wed, 13 Feb 2008 17:02:39 -0500 |

At 04:21 PM 2/13/2008, grsanta@unict.it wrote:

prchange is part of Long & Freese's -spost9- package and can be located via -findit-. I know what their routines often do is create and temporarily append fake cases to the data set, where these cases have the desired values, e.g. a half sd above the mean or a half sd below the mean. Their commands then use predict commands to get the predicted probabilities for these cases.Dear Statalisters, I would appreciate if anybody could let me know whethere there is anything like "prchange" commnad after ivprobit in STATA 9. I am trying to estimate the size-effect of some independent variables on the dependent one (e.g. the effect of minus/plu 1/2 standard deviation below and above the mean of the key independent variables on the probability that an event occurs), but I have been unable to work out how to do it after "ivprobit". Suggestions are welcome!

Also, sometimes you can use the -adjust- command for similar purposes.

I describe similar procedures on pp. 7-10 of

http://www.nd.edu/~rwilliam/stats2/Logistic-Stata9.pdf

Whether ivprobit raises some sort of special concerns that make the procedure more complicated or inappropriate, I don't know.

-------------------------------------------

Richard Williams, Notre Dame Dept of Sociology

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**References**:**st: st predicting probabilities after ivprobit***From:*grsanta@unict.it

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