Estimated cost of simulated releases.

Numbers of insects released and cases averted are taken from Table 3. All costs are in 2008 US$ millions, except the mean costs per case averted and incremental cost-effectiveness ratio (which are in 2008 US$). The incremental cost-effectiveness ratio of 10∶1 release compared to 1∶1 release is the extra cost (total cost of the program minus that of the program) divided by the extra cases averted (cases averted with minus cases averted with ).