Hi, I would like to compute ''SAS'' output statistic for logistic regression, namely the percent concordant, percent discordant, Sommer's D, Gamma, Tau-a...Actually, I'm very interested in percent concordant. Since the function 'cor' with method kendall compute the kendall's tau, I'm wondering how can I use this function to get back the percent concordant? Does anyone know if there is a package implementing those statistics? I look around on the web, but did not find anything useful. Thanks in advance Christophe [[alternative HTML version deleted]]