Impact of Post-harvest Loss Interventions on Post-Harvest Losses of Maize among Small Holder Farmers in Tanzania: A Difference in Difference (DID) Analysis

Abstract

We conducted a randomised controlled trial to test the impact of three simple and cost effective post-harvest loss prevention innovations suitable for smallholder farmers in low income economies. The interventions include, use of tarpaulins, use of hermetic bags and use of simple mechanised maize shellers. We use propensity score matching (PSM) and difference in difference (DID) method to empirically evaluate impact. Results show thatcombined use of the three innovations by smallholder households contribute to a reduction in postharvest losses amounting to about 273.6 Kilos of maize per household (About 3 bags per household). We conclude that simple cost effective postharvest loss mitigation innovations could go along a way in combatting food security and increase household incomes.

Keywords: Randomised control trial, Difference in Difference, post-harvest loss