Fig. 2

The choice probabilities of the four alternatives for a change in the pecuniary cost of the health center, aid post, or village health volunteer in the mild symptom sub-group (left: 2a, 2b, and 2c) and the choice probabilities of the four alternatives for a change in the pecuniary cost of the health center, aid post, or village health volunteer in the severe symptom sub-group (right: 2d, 2e, and 2f). The dashed line indicates each average cost. The unit of cost is in Papua New Guinea Kina (Kina 1 = USD 0.38). VHV: village health volunteer