In New York, Dr. Densen-Gerber reached out to new populations like prostitutes and addicted mothers.
This is a very good deal for states with small populations, like Wyoming or Montana.
Although large numbers are needed, there is still some advantage to relatively homogeneous populations like Iceland's.
And in relatively homogenous populations, like in some Westchester schools, competition runs high.
In in-bred populations like Europe's nobility, just as in isolated villages, everyone dips from the same little gene pool.
Unlike some other immigrant populations, like the Chinese, Mexicans have few programs for tutoring or mentoring.
Still, this factor could make some difference in states with heavy Hispanic populations, like Arizona.
Their impact is pervasive in states with heavy Hispanic populations, like New Mexico, Colorado and Florida.
At the height of the war, sales of American products fell in hundreds of small stores in cities with sizable Muslim populations, like Bangalore and Mumbai.
In universities with big Muslim populations, like University of Bradford, there will be a compelling sense of the issues and which practical measures might help.
Mr. Bloomberg needs to do well in communities with large organized Jewish populations, like Borough Park, Williamsburg, Forest Hills and Riverdale.
