Quality In general brands are noncomparable on the basis of quality since each brand can be highly ranked because it has some features that are not available with other brands For this reason since multidimensional modeling of quality is very difficult, we will follow the literature and assume that quality can be measured by a real number Thus, we assume that a higher-quality product is indexed by a higher real numberQuality • In general, brands are noncomparable on the basis of quality since each brand can be highly ranked because it has some features that are not available with other brands. • For this reason, since multidimensional modeling of quality is very difficult, we will follow the literature and assume that quality can be measured by a real number. Thus, we assume that a higher-quality product is indexed by a higher real number