As a result of the widespread introduction of market liberalization po
licies in Tanzania, research into food marketing requires a radically
different approach. This paper discusses the research methodology and
findings from surveys of grain traders and urban grain-consuming house
holds in five Tanzanian towns conducted during 1988, four years after
the government started to succumb to IMF pressure to liberalize the ma
rket distribution of staple foodstuffs. A single national market in st
aple foodstuffs was not yet apparent. Trade networks were still relati
vely rudimentary and unintegrated with distinct regional features. Con
sequently the methodological approach adopted entails detailed empiric
al study of the institutional development of food markets. In other wo
rds, emphasis is placed on the evolution rather than the operation of
the market.