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From |
Cameron McIntosh <cnm100@hotmail.com> |

To |
STATA LIST <statalist@hsphsun2.harvard.edu> |

Subject |
RE: st: SimpleSlopes in Multilevel Models |

Date |
Sun, 5 Feb 2012 16:35:17 -0500 |

If -zpos- is metric, you can generally do: b[ZSchaufelishort] | zpos value = b[ZSchaufelishort] + b[EExPOS]*zpos value for as many different values as you want. I assume that can be implemented via -lincom- and would invoke the ACM. Cam > Date: Sun, 5 Feb 2012 15:55:33 -0500 > Subject: Re: st: SimpleSlopes in Multilevel Models > From: skolenik@gmail.com > To: statalist@hsphsun2.harvard.edu > > If -zpos- is a binary variable with values 0/1, then the relation for > low levels is given by the coefficient itself, and for high levels, by > > lincom _b[ ZSchaufelishort ] + _b[ EExPOS ] > > which would invoke the covariance matrix behind the scenes. This can > also be done with -margins-, and the corresponding plots, with > -marginsplot-. > > On Sun, Feb 5, 2012 at 2:03 PM, Kerstin Alfes <KAlfes@gmx.de> wrote: > > Thanks for the references, Cam. I will look into them! > > > > Stan, I would like to graph the interaction and also calculate whether the relationship between ZSchaufelishort and logperformance is significant for high and/or low levels of ZPOS. If there is a way to do this without the ACM, that would help a lot. > > > > Best wishes > > Kerstin > > > > > > -------- Original-Nachricht -------- > >> Datum: Sun, 5 Feb 2012 10:21:14 -0500 > >> Von: Stas Kolenikov <skolenik@gmail.com> > >> An: statalist@hsphsun2.harvard.edu > >> Betreff: Re: st: SimpleSlopes in Multilevel Models > > > >> On Sun, Feb 5, 2012 at 9:31 AM, Cameron McIntosh <cnm100@hotmail.com> > >> wrote: > >> > If you want to dissect the interaction effects further, yes you would > >> need to estimate and test simple slopes, for which you would need the > >> covariance between the main effect and interaction coefficients as you say. I > >> don't know how to request the ACM in Stata, but tech support should be able to > >> help you. > >> > >> I am pretty sure one won't need to try to get the covariance matrices > >> (which are available as -e(V)-), as there is little you cannot do > >> between -test-, -testnl-, -lincom- and -nlcom-. Matrix code will be > >> ugly, and you need to master the convenience tools, anyway. What is > >> involved in "estimating and testing simple slopes"? > >> > >> -- > >> Stas Kolenikov, also found at http://stas.kolenikov.name > >> Small print: I use this email account for mailing lists only. > >> > >> * > >> * 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/ > > > > -- > > Kerstin Alfes > > > > Kettelerweg 24 > > 57482 Wenden > > Germany > > Phone: +49-(0)2762-2766 > > Mobile: +49-(0)174-160 15 44 > > > > Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir > > belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de > > * > > * 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/ > > > > -- > Stas Kolenikov, also found at http://stas.kolenikov.name > Small print: I use this email account for mailing lists only. > > * > * 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/ * * 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/

**Follow-Ups**:**Re: RE: st: SimpleSlopes in Multilevel Models***From:*"Kerstin Alfes" <KAlfes@gmx.de>

**References**:**st: SimpleSlopes in Multilevel Models***From:*"Kerstin Alfes" <KAlfes@gmx.de>

**Re: st: SimpleSlopes in Multilevel Models***From:*Stas Kolenikov <skolenik@gmail.com>

**Re: st: SimpleSlopes in Multilevel Models***From:*"Kerstin Alfes" <KAlfes@gmx.de>

**Re: st: SimpleSlopes in Multilevel Models***From:*Stas Kolenikov <skolenik@gmail.com>

**Re: st: SimpleSlopes in Multilevel Models***From:*"Kerstin Alfes" <KAlfes@gmx.de>

**Re: st: SimpleSlopes in Multilevel Models***From:*Stas Kolenikov <skolenik@gmail.com>

**RE: st: SimpleSlopes in Multilevel Models***From:*Cameron McIntosh <cnm100@hotmail.com>

**Re: st: SimpleSlopes in Multilevel Models***From:*Stas Kolenikov <skolenik@gmail.com>

**Re: st: SimpleSlopes in Multilevel Models***From:*"Kerstin Alfes" <KAlfes@gmx.de>

**Re: st: SimpleSlopes in Multilevel Models***From:*Stas Kolenikov <skolenik@gmail.com>

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