Caves, Douglas W.; Christensen, Laurits R.; Herriges, … - In: RAND Journal of Economics 18 (1987) 4, pp. 564-580
Hick's theorem permits aggregation of commodities when their relative prices are fixed, but, contrary to a widely expressed view, it does not require that they be aggregated. Even where commodities have identical prices, all of their income elasticities and many of their price elasticities can...