plm version 2.6-5

mainly fixes for handling of FD models and some around pgmm/mtest.

plm version 2.6-4

mostly new features and speed improvement for pvcm, many minors

plm version 2.6-3

Mostly speed-up and little maintenance

plm version 2.6-2

Main innovations are the predict() function (also working for FE models) and the speed-ups in the group-wise model estimation functions pcce(), pggls(), pmg(), and test functions cipstest(), pcdtest().

plm version 2.6-1

mainly to pacify CRAN checks due to R-devel deprecating default.stringsAsFactors()

plm version 2.6-0

Make optional speed-up the default

plm version 2.4-3

CRAN release