#NEWLINE# @ cache_readonly #NEWLINE# def bse_fe( self ) : #NEWLINE# #INDENT# '\n        Returns the standard errors of the fixed effect regression\n        coefficients.\n        ' #NEWLINE# p = p . model . exog . shape [ 1 ] #NEWLINE# return np . sqrt ( np . diag ( self . cov_params ( ) ) [ 0 : p ] )