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From |
Maarten Buis <maartenlbuis@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: question about the interaction term |

Date |
Thu, 25 Apr 2013 09:05:58 +0200 |

On Thu, Apr 25, 2013 at 6:12 AM, ZHVictor wrote: > In B=0 case, I have a significant slope for A > In B=1 case, the slope of A becomes coefficient of A+coefficient of A*B, however it becomes insignificant. > A*B is an interaction term. I have an insignificant coefficient of A*B. That means the coefficient of A*B is like 0 > Thus, in B=1 case, the slope of A is like coefficient of A+0. Therefore, I am expecting in B=1 case, the slope of A should be also significant as in B=0 case. This is a good example of the point made in: Andrew Gelman and Hal Stern (2006) The Difference Between "Significant" and "Not Significant" is not Itself Statistically Significant. The American Statistician, 60(4):328-331. <http://www.stat.columbia.edu/~gelman/research/published/signif4.pdf> Hope this helps, Maarten --------------------------------- Maarten L. Buis WZB Reichpietschufer 50 10785 Berlin Germany http://www.maartenbuis.nl --------------------------------- * * 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: question about the interaction term***From:*ZHVictor <victerzj2@hotmail.com>

**References**:**st: question about the interaction term***From:*ZHVictor <victerzj2@hotmail.com>

**Re: st: question about the interaction term***From:*David Hoaglin <dchoaglin@gmail.com>

**RE: st: question about the interaction term***From:*ZHVictor <victerzj2@hotmail.com>

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