[R] Hausman test

[PAOLO PILI]

you are right about the 3rd line but it doesn't help me for my problem. I
remove the 3rd line but there is still the same problem:

Error in solve.default (dvcov):
   the system is numerically unique: reciprocity condition value =
1.63418e-19

Paolo

2018-02-11 16:54 GMT+01:00 Bert Gunter <bgunter.4567 at gmail.com>:

> 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.pili at 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+TU
>> RN+GPROF+GPROF2
>> >
>> grun.fe<-plm(RECEIV~LSIZE+LAGE+LAGE2+CFLOW+STLEV+FCOST+PGROW
>> TH+NGROWTH+TURN+GPROF+GPROF2,data=data,model="within")
>> > grun.re
>> <-plm(RECEIV~LSIZE+LAGE+LAGE2+CFLOW+STLEV+FCOST+PGROWTH+NGRO
>> WTH+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
>>
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>>
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>>
>

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