ABSTRACT
The number of distinet traded eommodities is so great that it is impossible to diseuss the determinants of trade eoherently without some system of aggregation. Aggregation results of Fisher (1969) and Chipman (1976) are adapted he re to aggregate a system of trade equations that explain the level of net exports of a set of fifty-six eommodity groups. These eommodity groups are eombined if their net exports are similarly affeeted by measured faetor supplies induding land, labour and eapital.
