= Cost-effectiveness acceptability curve
{title2=$\lambda\mapsto\Pr(\lambda\Delta E-\Delta C>0)$}
A <cost-effectiveness acceptability curve> displays the probability of positive <incremental net monetary benefit> as a function of the willingness-to-pay threshold. Under a <posterior distribution> this is a posterior probability. A frequentist paired <bootstrap> version displays the fraction of replicates for which the net benefit is positive, a resampling measure of uncertainty rather than literally a probability that a fixed true parameter is positive. Using the sign of net benefit handles all quadrants of the <cost-effectiveness plane>; counting only replicates whose ratio is below the threshold does not.
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