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From |
Richard Williams <richardwilliams.ndu@gmail.com> |

To |
statalist@hsphsun2.harvard.edu, statalist@hsphsun2.harvard.edu |

Subject |
Re: st: indicator variable and interaction term different signs but both significant |

Date |
Sun, 07 Apr 2013 15:58:40 -0500 |

At 07:34 AM 4/7/2013, David Hoaglin wrote:

Richard, That statement may be all right in Nahla's analysis. The difficulty lies in the phrase "and the values of other variables are the same for both." OC_MV = 0 because MV = 0; that is a special case. We don't know that the data contain overconfident managers and rational managers for whom the values of size, leverage, litigation, private_D, and same_D are the same (or nearly enough the same). If so, no problem. If not, the statement is an extrapolation, not supported by the data. It is up to Nahla (and to analysts generally) to avoid extrapolating (too far) beyond the data. Many people (and textbooks) give that sort of interpretation without any evidence of checking on extrapolation.

------------------------------------------- Richard Williams, Notre Dame Dept of Sociology OFFICE: (574)631-6668, (574)631-6463 HOME: (574)289-5227 EMAIL: Richard.A.Williams.5@ND.Edu WWW: http://www.nd.edu/~rwilliam * * 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: indicator variable and interaction term different signs but both significant***From:*David Hoaglin <dchoaglin@gmail.com>

**References**:**st: indicator variable and interaction term different signs but both significant***From:*Nahla Betelmal <nahlaib@gmail.com>

**Re: st: indicator variable and interaction term different signs but both significant***From:*Anthony Fulginiti <fulginit@usc.edu>

**Re: st: indicator variable and interaction term different signs but both significant***From:*Nahla Betelmal <nahlaib@gmail.com>

**Re: st: indicator variable and interaction term different signs but both significant***From:*Richard Williams <richardwilliams.ndu@gmail.com>

**Re: st: indicator variable and interaction term different signs but both significant***From:*Nahla Betelmal <nahlaib@gmail.com>

**Re: st: indicator variable and interaction term different signs but both significant***From:*David Hoaglin <dchoaglin@gmail.com>

**Re: st: indicator variable and interaction term different signs but both significant***From:*Richard Williams <richardwilliams.ndu@gmail.com>

**Re: st: indicator variable and interaction term different signs but both significant***From:*David Hoaglin <dchoaglin@gmail.com>

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