Chale, how much it cost to browse?: results from a mobile data price transparency trial in Ghana. - Nithya Sambasivan; Paul Lee; Greg Hecht; Paul M. Aoki; Maria-Ines Carrera; Jenny Chen; David Pablo Cohn; Pete Kruskall; Everett Wetchler; Michael Youssefmir; Astrid Twenebowa Larssen (ICTD (1), 2013)