'p-values corrected for multiple testing problem
This uses the default p-value correction of the instance stored in
``self.multitest_method`` if method is None.'

def pval_corrected(self, method=None):

    import statsmodels.stats.multitest as smt
    if (method is None):
        method = self.multitest_method
    return smt.multipletests(self.pvals_raw, method=method)[1]
