Modelling Wealth from Call Detail Records and Survey Data with Machine Learning: Evidence from Papua New Guinea. - Muhammad Rizal Khaefi; Hendrik; Dharani Dhar Burra; Rio Fandi Dianco; Dikara Maitri Pradipta Alkarisya; Muhammad Rheza Muztahid; Annissa Zahara; George Hodge; Rajius Idzalika (IEEE BigData, 2019)