Panel-corrected covariance matrix estimators for models of class "prais"
.
# S3 method for prais
vcovPC(x, pairwise = FALSE, ...)
An object of class "matrix".
an object of class "prais"
, usually, the result of a call to prais_winsten
.
logical. If FALSE
(default), only those residuals from periods that are common to
all panels are used to computed the covariances. If TRUE
all observations that can be matched by
period between two panels are used.
not used.
vcovPC
is a function for estimating a panel-corrected covariance matrix of parameters for
the Prais-Winsten estimator.
Beck, N. L. and Katz, J. N. (1995): What to do (and not to do) with time-series cross-section data. American Political Science Review 89, 634-647.
vcovPC