It can also help by supporting trade policy and regulation, and trade development (GTZ, 2010). Support to trade policy and regulation can be channeled to developing the capacity of public and private stakeholders at national and regional levels; supporting the adoption, where appropriate, of international standards as a basis of domestic regulation, as well as the regional harmonisation of standards and quality assurance systems which best reflect the specific climatic, geographical and technological circumstances in the concerned countries; and reducing trade barriers that affect regional as well as international agricultural trade and exacerbate informal trade (Lesser and Moi'se, 2009). Within this large range of possible activities and reforms, the quantification of the effect of various supply-side constraints to developing countries’ agricultural trade can offer useful insights for the prioritisation of aid for trade actions and for supporting the dialogue between donor and recipient countries.