#NEWLINE# @ cache_readonly #NEWLINE# def bse_re( self ) : #NEWLINE# #INDENT# '\n        Returns the standard errors of the variance parameters.  Note\n        that the sampling distribution of variance parameters is\n        strongly skewed unless the sample size is large, so these\n        standard errors may not give meaningful confidence intervals\n        of p-values if used in the usual way.\n        ' #NEWLINE# p = self . model . exog . shape [ 1 ] #NEWLINE# return np . sqrt ( ( self . scale * np . diag ( self . cov_params ( ) ) [ p : ] ) )