Net economic benefit as a function of p, for α = 0.05 , α = 0.25 and α = 0.55 . Each point is the mean of 20 simulation runs with error bars showing ±1 standard deviation. Parameters: q = 0.5, c = 0.05, and r
= 2. Only region A is marked as the locations of regions B, C, and D vary with α.