Note the typo in your 3rd line: data < Don't know if this means anything...
Bert On Feb 11, 2018 7:33 AM, "PAOLO PILI" <paolo.p...@student.unife.it> wrote: > Hello, > > I have a problem with Hausman test. I am performing my analysis with these > commands: > > > library(plm) > > data<-read.csv2("paolo.csv",header=TRUE) > > data< > pdata.frame(data,index=c("FIRM","YEAR"),drop.index=TRUE,row.names=TRUE) > > > RECEIV~LSIZE+LAGE+LAGE2+CFLOW+STLEV+FCOST+PGROWTH+NGROWTH+ > TURN+GPROF+GPROF2 > > > grun.fe<-plm(RECEIV~LSIZE+LAGE+LAGE2+CFLOW+STLEV+FCOST+ > PGROWTH+NGROWTH+TURN+GPROF+GPROF2,data=data,model="within") > > grun.re > <-plm(RECEIV~LSIZE+LAGE+LAGE2+CFLOW+STLEV+FCOST+PGROWTH+ > NGROWTH+TURN+GPROF+GPROF2,data=data,model="random") > > > gw<-plm(RECEIV~LSIZE+LAGE+LAGE2+CFLOW+STLEV+FCOST+ > PGROWTH+NGROWTH+TURN+GPROF+GPROF2,data=data,model="within") > > > gr<-plm(RECEIV~LSIZE+LAGE+LAGE2+CFLOW+STLEV+FCOST+ > PGROWTH+NGROWTH+TURN+GPROF+GPROF2,data=data,model="random") > > phtest(gw,gr) > > I got this answer: > > Error in solve.default(dvcov) : > > how can I solve this problem? > > Thank you > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.