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From |
Francisco Rowe <frowe@ucn.cl> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: Notation of the Negative Binomial Model |

Date |
Thu, 2 Jun 2011 22:19:01 +1000 |

I am a little confused on the notation of the Negative Binomial Model. I want to express the equation such as the variables are used by the stata command nbreg Let say that I want to estimate this: nbreg y x1 x2 x3 (1) where y: dependent variable; xs: explanatory variables. My confusion starts when I look at the notation on books that usually write it in general terms as: lamda = E[ yi | xi ] = exp(xi’Beta) Where: E[ yi | xi ] : the expected mean of y conditional on xi. The latter express in matrix form. Regarding my model (1), my question is can I write this: y= exp(b0+ b1*x1 + b2*x2 + b2*x2+e) where: bs: beta parameters; e: random error Thank you in advance. Francisco. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

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