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On Sun, Jun 9, 2013 at 3:42 PM, Katie Farrin <kfarrin@gmail.com> wrote:
> Hi, Statalisters,
>
> I'm working with data with left-censored values (at zero) and am thus
> far using a Tobit model.  One of my professors mentioned a
> zero-inflated Tobit versus a regular Tobit.  My dependent variable,
> business profits, is censored at zero for survey respondents who do
> not own any part of a private business.  However, for those who do
> report business income (only about 1/5 of the sample), profits can be
> negative.
>
> First, I am wondering if there is a Stata program that performs
> zero-inflated continuous data regressions.  I have not come across a
> program that does zero-inflated Tobit.  Second, I was wondering if
> anyone familiar with the models could give a brief explanation of the
> advantages of a zero-inflated model compared to a standard Tobit; I
> have read articles showing differences in parameter estimates using
> the two types of models, but am a little confused about the
> assumptions regarding the data generation process when I compare the
> two models for my research.
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