APEEP permits a characterization of the variation in marginal damages across sources and across space.
This marginal damage algorithm is repeated for each of the six pollutants and the approximately 10,000 sources covered in APEEP. This involves 60,000 repetitions of the simulation design described above.
Although APEEP computes damages due to health effects as well as reduced crop and timber yields, materials depreciation, lost recreation services, and reduced visibility, previous research has shown that the largest share of damages stems from impacts on human health, especially premature mortality rates.
The final stage of the APEEP model attributes a dollar value to the impact on mortality rates due to exposures to fine particles and ozone.