is about is_specified_input_of statistic statistical model statistical model selection Mallows' Cp Orlaith Burke Philippe Rocca-Serra Mallows' Cp is a data item which compares the precision and bias of the full model to models with a subset of the predictors thus helping to choose between multiple regression models. the mallows cp is a function of the number of parameter used in the model relying on the residuals sum of squares to compute a score. the smaller Cp is, the better the model fit is. http://support.minitab.com/en-us/minitab/17/topic-library/modeling-statistics/regression-and-correlation/goodness-of-fit-statistics/what-is-mallows-cp/ http://ugrad.stat.ubc.ca/R/library/locfit/html/cp.html Alejandra Gonzalez-Beltran ready for release