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From |
Johannes Kotte <johannes.kotte@st.ovgu.de> |

To |
statalist@hsphsun2.harvard.edu, "JVerkuilen (Gmail)" <jvverkuilen@gmail.com> |

Subject |
Re: st: SEM becomes unidentified when introducing single item control variables |

Date |
Tue, 15 Jan 2013 17:49:39 +0100 |

Thanks for your reply!

sem (y1 y2 y3 y4 <- PRAXREL) /// (x1 x2 x3 x4 x5 x6 x7 <- BKA) /// (x8 x9 x10 x11 <- KVSENIOR) /// (x12 x13 x14 x15 <- KVL) /// (BKA PRAXREL <- KVSENIOR KVL x16 x17 x18 x19) /// (PRAXREL <- BKA) /// , standardized method(mlmv)

Again, thanks a lot! Johannes

Zitat von "JVerkuilen (Gmail)" <jvverkuilen@gmail.com>:

The standard errors being crazy is a sign that the model is not identified. I'd suspect it's because the latent variables for these controls aren't identified, and given that it doesn't sound like you have a measurement model for them I'm not sure how they could be. Why are they latent anyway? * * 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/

---------------------------------------------------------------------- Datum: Tue, 15 Jan 2013 15:21:36 +0100 Von: Johannes Kotte <johannes.kotte@st.ovgu.de>

An: statalist@hsphsun2.harvard.edu Dear fellow researchers,

Can anybody give me advice? I would greatly appreciate that! Thanks in advance! Johannes CODE FOR BOTH MODELS: /***MODEL 1***/ sem (y1 y2 y3 y4 <- PRAXREL) /// (x1 x2 x3 x4 x5 x6 x7 <- BKA) /// (x8 x9 x10 x11 <- KVSENIOR) /// (x12 x13 x14 x15 <- KVL) /// (BKA PRAXREL <- KVSENIOR KVL) /// (PRAXREL <- BKA) /// , standardized method(mlmv) /***MODEL 2***/ sem (y1 y2 y3 y4 <- PRAXREL) /// (x1 x2 x3 x4 x5 x6 x7 <- BKA) /// (x8 x9 x10 x11 <- KVSENIOR) /// (x12 x13 x14 x15 <- KVL) /// (x16 <- CV1) /// (x17 <- CV2) /// (x18 <- CV3) /// (x19 <- CV4) /// (BKA PRAXREL <- KVSENIOR KVL CV1 CV2 CV3 CV4) /// (PRAXREL <- BKA) /// , standardized method(mlmv) -- Johannes Kotte

Telefon: +49-173-6371955 | E-Mail: johannes.kotte@st.ovgu.de * * 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: SEM becomes unidentified when introducing single item control variables***From:*"William Buchanan" <william@williambuchanan.net>

**References**:**st: SEM becomes unidentified when introducing single item control variables***From:*Johannes Kotte <johannes.kotte@st.ovgu.de>

**Re: st: SEM becomes unidentified when introducing single item control variables***From:*"JVerkuilen (Gmail)" <jvverkuilen@gmail.com>

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