Replaced with revised version of paper 06/30/08.

Replaced with revised version of paper 07/24/09.

Regional integration through trade is recognized as one way to foster economic growth and poverty reduction. This paper uses the gravity model and 11-year panel data (1996-2006) on Southern African Development Community (SADC) member countries to study Zambia’s regional agricultural trade...

Prepared for the COMESA policy seminar on“Variation in staple food prices: Causes, consequence, and policy options”,Maputo, Mozambique, 25-26 January 2010under the Comesa-MSU-IFPRI African Agricultural Marketing Project (AAMP)

The article investigates the existence of market externalities due to increasing returns to marketing. Panel data on 198 pairs of maize markets in Zambia and correlated random effects linear and tobit estimators were used to model the relationship between market externalities and...