Practice,

nal of Public Health contains 6 ar-ticles focusing on models of pop-ulation health. These models are schematic representations of fac-tors that affect the health of pop-ulations, measured primarily as the average level of health in the population, but increasingly also considering the distribution of health within populations. Taken together, these articles provide an introduction to current US, Canadian, and European debates over population health, the fac-tors that influence populatio