library(splm)
载入需要的程辑包：MASS
载入需要的程辑包：nlme
载入需要的程辑包：spdep
载入需要的程辑包：sp
载入需要的程辑包：boot
载入需要的程辑包：Matrix
载入需要的程辑包：lattice

载入程辑包：'lattice'

The following object(s) are masked from 'package:boot':

    melanoma


载入程辑包：'Matrix'

The following object(s) are masked from 'package:base':

    det

载入需要的程辑包：maptools
载入需要的程辑包：foreign
Checking rgeos availability: FALSE
        Note: when rgeos is not available, polygon geometry     computations in maptools depend on gpclib,
        which has a restricted licence. It is disabled by default;
        to enable gpclib, type gpclibPermit()
载入需要的程辑包：deldir
deldir 0.0-15

     Please note: The process for determining duplicated points
     has changed from that used in version 0.0-9 (and previously).

载入需要的程辑包：coda
载入需要的程辑包：plm
载入需要的程辑包：bdsmatrix
载入需要的程辑包：Formula
载入需要的程辑包：sandwich
载入需要的程辑包：zoo

载入程辑包：'zoo'

The following object(s) are masked from 'package:base':

    as.Date

载入需要的程辑包：spam
Package 'spam' is loaded. Spam version 0.27-0 (2011-08-17).
Type demo( spam) for some demos, help( Spam) for an overview
of this package.
Help for individual functions is optained by adding the
suffix '.spam' to the function name, e.g. 'help(chol.spam)'.

载入程辑包：'spam'

The following object(s) are masked from 'package:Matrix':

    norm

The following object(s) are masked from 'package:base':

    backsolve, forwardsolve, norm

载入需要的程辑包：ibdreg
载入需要的程辑包：car
载入需要的程辑包：nnet
载入需要的程辑包：survival
载入需要的程辑包：splines

载入程辑包：'survival'

The following object(s) are masked from 'package:boot':

    aml


载入程辑包：'car'

The following object(s) are masked from 'package:boot':

    logit

载入需要的程辑包：lmtest
> data(Produc,package="Ecdat")
> Produc<-Produc[Produc$year%in%1970:1974,]
> data(usaww)
> res<-spfeml(fm,data=Produc,listw=mat2listw(usaww),effects="spfe",
+ method="eigen")
错误: 没有"spfeml"这个函数