Hi, I want to estimate a dynamic paneldata model with the following code, but unfortenately I received the error message below. form<-PB~Activity+Solvency+Cap_Int dynpanel<-pgmm(dynformula(form,list(1,1,1,1)),data=panel[1:2185,1:37],effect="twoways",model="onestep",index=c("Aktie","Datum"),gmm.inst=~PB,lag.gmm=list(c(2,12)),transformation="ld") Fehler in FUN(X[[1L]], ...) : Indizierung au?erhalb der Grenzen dim(panel) [1] 34086 37 Best regards, Marco -- GRATIS f?r alle GMX-Mitglieder: Die maxdome Movie-FLAT!