[R] About systemfit package

Dear friends, I have written the following lines in R console wich already exist in pdf file systemfit: data( GrunfeldGreene ) library( plm ) GGPanel - plm.data( GrunfeldGreene, c( firm, year ) ) greeneSur - systemfit( invest ~ value + capital, method = SUR, + data = GGPanel ) greenSur I have

[R] about systemfit package

Dear friends, I have written the following lines in R console wich already exist in pdf file systemfit: data( GrunfeldGreene ) library( plm ) GGPanel - plm.data( GrunfeldGreene, c( firm, year ) ) greeneSur - systemfit( invest ~ value + capital, method = SUR, + data = GGPanel ) greenSur I have