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From |
Edwin Leuven <e.leuven@uva.nl> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: ln1=0 for missing values |

Date |
Wed, 21 Apr 2004 15:10:21 +0200 |

fatma bircan wrote:

For example in a Tobit model if we make a log transformation of thei suggest you read chapter 16 of:

expenditures (dep. var.) some values of the dep. var. will have

missing values since they were originally equal to zero. But assuming

that the zero exp. =1 and then taling the log of expenditures, we can

estimate the tobit model. Is this OK for having extra grouns?

http://mitpress.mit.edu/wooldridge-EconAnalysis

it explains very clearly the issues, and how you should properly calculate partial effects in corner solution models like yours

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**Follow-Ups**:**Re: st: RE: ln1=0 for missing values***From:*fatma bircan <bircan@metu.edu.tr>

**References**:**Re: st: RE: ln1=0 for missing values***From:*fatma bircan <bircan@metu.edu.tr>

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