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From |
Suryadipta Roy <sroy2138@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: Interpretation of interaction term in nonlinear models |

Date |
Thu, 30 May 2013 07:19:16 -0400 |

Dear Statalisters, I am studying the effect of an interaction between a categorical variable (0/1) and a continuous variable (0-6) on the dependent variable in a nonlinear model (using -xtpoisson-). The value of the coefficient using the -irr- option is 0.90, while the size of the interaction term in the probability metric form is, of course, -0.11 (exp(-0.11) = 0.90). My basic question is, if it might be possible to have a one-sentence interpretation of the value of the coefficient in the multiplicative form (0.90), e.g. something in the lines of "the effect of the categorical variable increases by a factor of 0.9 (i.e. a 10% reduction of the dependent variable) due to an 1% increase in the continuous variable"? Any suggestion in this regard will be highly appreciated. Sincerely, Suryadipta Roy. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**Re: st: Interpretation of interaction term in nonlinear models***From:*Suryadipta Roy <sroy2138@gmail.com>

**Re: st: Interpretation of interaction term in nonlinear models***From:*Maarten Buis <maartenlbuis@gmail.com>

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