In this survey we present the main results on the problem of aggregation across agents in demand systems, when no restrictions are placed on income distribution. The focus is on the theoretical aspects of the results. The implications for empirical work are made explicit, but not dealt with in detail.
Aggregation Across Agents in Demand Ssystems / Brighi, Luigi; Forni, Mario. - In: RICERCHE ECONOMICHE. - ISSN 0035-5054. - STAMPA. - XLV, 1:(1991), pp. 79-114.