Where t(V) is the transformed variable V where the exponent Exp intervalis[0;1].Sincethepowertransformations,demonstratedby Eq. (1), are monotonically increasing, a positive effect of a variable willremainpositiveafterthetransformation.Thereforethesignof a regression coefficient can be interpreted in terms of whether it hasapositiveornegativeeffectofyields.Thesizeoftheregression