Improving effective coverage in health do financial incentives work? - De Walque, Damien; Kandpal, Eeshani; Wagstaff, Adam 1959-; Friedman, Jed; Piatti-Fünfkirchen, Moritz; Sautmann, Anja; Shapira, Gil; Van de Poel, Ellen 1980- (Policy Research Reports, 2022)