data<-read.table(file="data.txt",header=TRUE)
library(Formula)
library(plm)
library(pgmm)
gmm<-pgmm(dynformula(y~log(x2)+x3+x4+x5+x6+x7,lag=list(1,0,0,0,0,0,0),log=FALSE),p,effect="twoways",model="onestep",gmm.inst=~y,lag.gmm=list(c(1,3)))
gmm<-pgmm(dynformula(y~log(x2)+x3+x4+x5+x6+x7,lag=list(1,0,0,0,0,0,0),log=FALSE),data,effect="twoways",model="onestep",gmm.inst=~y,lag.gmm=list(c(1,3)))
> summary(gmm)
报错:错误于!class_ind : 参数种类不对
求助各位大神~~~