Baliè, Jean and Del Prete, Davide and Magrini, Emiliano and Montalbano, Pierluigi and Nenci, Silvia  Agriculture and Food Global Value Chains in Sub-Saharan Africa: Does bilateral trade policy impact on backward and forward participation?  EIC working paper series  #3/2017    IMT School for Advanced Studies Lucca    ISSN 2279-6894.