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Justin Bem wrote:> I got this message, while using the polr function in MASS > > Error in polr(EQ, don, subset = (cote != 0), method = "probit", na.action = na.omit) : > attempt for find suitable starting values failed > > how can I initialise starting values ?You might try running an ordered logistic in lrm() and using those estimates as starting values (if it runs OK). David Duffy.