Working Document Series Open Access Transaction costs and food security: A case of maize in southern highlands of Tanzania F.T.M. Kilima · B. Maonga · M.B. Mbise · D.H. Ngongola +1 more The study will asses transaction costs in the maize marketing channels in Southern Highlands of Tanzania (Iringa, Mbeya and Ruvuma). This is a major maize producing zone. Linking this zone with food deficit regions like coastal areas and D… RUF-34934 2010 CC BY 4.0 14 Sep 2015