ホワイト・フライト
"White flight" is one theory supporting the idea that racial concentrations influence residential choice. The premise of this belief is that an increase in the population of blacks in a specific locality will cause whites to leave once the concentration of blacks reaches a certain level. The support for this hypothesis is largely anecdotal but analyses of surveys of white and black attitudes toward the racial make-up of neighborhoods confirm that some whites are uncomfortable with even a small number of black neighbors.