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. 2012 Jul 6;11:34. doi: 10.1186/1475-9276-11-34

Table 4.

Levels of altruistic willingness to pay by geographic location

Variable Urban N = 2294 Rural N = 2223 X2 (p-value)
Whether willing to contribute: n (%)
1430 (62.3%)
1505 (67.7%)
0.017(.90)
Average annual altruistic WTP amount: Naira mean (SD)
760.2 (1244.6)
635.0 (1008.4)
17.1 (<.0001)
Average annual altruistic WTP amount in US$ 5.1 4.2