“…Therefore, its saturation is an important factor characterising households' well-being. Typically, at a certain level of income, some households are not satisfied with possession of just one unit of a certain good, and are willing to acquire more than one, usually each next purchase being of better quality (Dziechciarz, Dziechciarz-Duda, Przybysz, 2010;Dziechciarz-Duda, 2007: 395).…”