This study is a continuation of the research reported in A Study of the Demography of Nuclear War. The report examines the impact of a nuclear attack on selected occupational groups within the Census classifications and compares the impact of the attack on those groups with the changes in the Census classifications and concludes that the compositional impact for specific occupations may be greater than and different from the changes in the Census classifications of which such occupations are a part. In addition, the report examines the impact of strategic evacuations of populations in American cities and compares selected demographic indices for four cities in terms of those evacuation patterns and change in points of detonation. Over all, the results indicate that compositional effects vary with all the parameters mentioned above and the report argues that these variations are sufficiently large to warrant attention.