Such cooperation between UNCTAD , developing countries , other institutions and donors has proved to be very effective in exchanging knowledge and expertise and developing networks in delivering trade and trade-related capacity-building assistance , undertaking research and policy analyses and facilitating intergovernmental deliberations . UNCTAD convenes the Working Group on Trade of the Executive Committee of the Economic and Social Affairs ( EC-ESA ) , which involves UNCTAD , UN regional commissions and UNEP .