 von Grebmer, Klaus; Headey, Derek; Béné, Christophe; Haddad, Lawrence; Olofinbiyi, Tolulope; Wiesmann, Doris; Fritschel, Heidi; Yin, Sandra; Yohannes, Yisehac; Foley, Connell; von Oppeln, Constanze; and Iseli, Bettina.2013.2013 Global Hunger Index