Agricultural Trade Policies and Food Security: Is there a Causal Relationship?

The aim of this paper is to assess the causal impact of trade policy distortions on food security.The added value of this work is twofold:i)its use of an on-parametric matching technique with continuous treatment,namely the Generalised Propensity Score(GPS)to address the self selection bias;ii)its analys is of heterogeneity in treatment(by commodities)as well as inoutcome(i.e.different dimensions of food security).The results of our estimates clearly show that trade policy distortions are,overall,significantly correlated with the various dimensions of food security analysed. Both discrimination against agriculture and 'excessive' support lead to poor performances in all dimensions of foodsecurity (availability,access,utilisation and stability).