R-cran-plm/plm/NEWS.md

385 * pgmm object: removed element 'df.residual' for now as it contained the
397     random model (was "matrix" with one column); element 'df.residuals' renamed
398     to 'df.residual' (as is standard, cf. lm, plm, ...).
463         fixed degrees of freedom (now df = 2 instead of df = 1).
589 * summary.plm: summary.plm objects gained new component 'df' to mimic summary.lm objects more close…
628                    type and df.residual added as attributes.
667            gained a "df.residual" element.
959 * the deviance method for panelmodel objects is now exported (12/02).
968 * an update method for panelmodel objects is provided.
998 * the predict method for panelmodel objects is now exported.
1009     like 'pggls', together with 'panelmodel'.
1014     ("pmg"), much like 'pggls', together with 'panelmodel'. In the
1027 * an index method is added for panelmodel, pdata.frame and pseries.
1285     panelmodel and pgmm models.
1300 * a model.matrix method for panelmodel is provided.
1330 * the arguments 'type' and 'weights' in pvcovHC.panelmodel are renamed
1382 * pgmm objects now inherit from panelmodel like other estimators