“…Furthermore, using a quadratic error measure leads to a penalization of comparatively large forecast errors. The RMSE given in Formula below is one very commonly applied error measure (see, e.g., Andres & Spiwoks, ; Espinoza, Fornari, & Lombardi, ; Hyndman & Koehler, ; Kisinbay, ; Leitch & Tanner, ; and more recently Herwartz & Schlüter, ; Ryan & Whiting, ; as well as Wegener, Spreckelsen, Basse, & Mettenheim, ). …”