Hello, I want to compare 6 non-nested models lm(Y1~X11),lm(Y1~X12),lm(Y1~X13),lm(Y1~X14),lm(Y1~X15),lm(Y1~X16) based on their R2 values. I am using jtest as following: jtest(lm(Y1~X11),lm(Y1~X12)) jtest(lm(Y1~X11),lm(Y1~X13)) jtest(lm(Y1~X11),lm(Y1~X14)) etc Is there is a way to generalize it? Would jtest be appropriate technique if I want to find out whether change in R2 across models is significant? Many thanks Olga