共 35 条
[3]
Angrist JD, 2009, MOSTLY HARMLESS ECONOMETRICS: AN EMPIRICISTS COMPANION, P1
[4]
Asante RKB, 2018, GHANA SOC SCI J, V15, P161
[7]
BBC, 2019, BBC News
[10]
Bell A, 2019, Qual Quant, V53, P1051, DOI [10.1007/s11135-018-0802-x, DOI 10.1007/S11135-018-0802-X, DOI 10.1007/S11135-018-0802-X/FIGURES/2]