“…Other techniques have been successfully used, including elastic net shrinkage (Li, Tsiakas, & Wang, ), gradient boosting (Berge, ), and model averaging/selection (Della Corte, Sarno, & Tsiakas, ; Della Corte & Tsiakas, ; Kouwenberg, Markiewicz, Verhoeks, & Zwinkels, ). All these approaches find sparsity to be an important modeling feature and, in particular, Kouwenberg et al () illustrate also the time‐varying relevance of regressors in a univariate framework.…”