Hi, I suggest you take a look at the mixed model materials in Zelig, which has both a structural form and a reduced form model specification for multilevel model. The structural form specification is what you need.
Shige On Feb 13, 2008 11:53 PM, Ista Zahn <[EMAIL PROTECTED]> wrote: > Dear R listers, > I know I'm breaking the rules by asking a "homework" related question-- > I hope you'll forgive me. I am a social psychology graduate student, > and the only one in my department who uses R. I successfully completed > my multiple regression and structural equation modeling courses using > R (John Fox's car and sem packages were a big help, as was his book). > Now I am taking a hierarchical linear modeling course, and am hoping > that I can use R for this also. I've searched the list archives, and > consulted the one-line version of Pinheiro and Bates (available > through my library), but I'm having a great deal of difficulty > translating what I'm learning in class into lmer syntax. Specifically, > the instructor is using HLM 6.0. In this program, one specifies the > level one and level two models explicitly, and I'm having trouble > understanding what the equivalent of this is in lmer. Most of the > examples we cover in class are change models, i.e., we working with > longitudinal data. > > Specific questions: > > in HLM 6.0, we build the following model; > > Y = P0 + P1*(CONFLICT) + P2*(TIMEYRS) + E > Level-2 Model > P0 = B00 + B01*(H0MCITOT) + R0 > P1 = B10 + B11*(H0MCITOT) + R1 > P2 = B20 + B21*(H0MCITOT) + R2 > > Can someone explain to me how to represent this in lmer syntax? I've > tried e.g., > > lmer(MAT ~ 1 + CONFLICT + TIMEYRS + (1 + CONFLICT + > + TIMEYRS | H0MCITOT)) > > But I don't get the same result. > > More generally: Should I be using the lme4 package, the nlme package, > or something else entirely? Is there any documentation for the lme4 > package that is geared more towards novice users? > > Sorry for the long post, and thanks in advance for any help you can > offer. > > --Ista > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
