The “halo effect” is a perceptual tendency which causes us to be more generous in our judgment of ourselves over others.

The statement is "False".
In general words "Halo effect" means what we perceive of a person influence our ideas about him in other fields also. A simple example is of a celebrity who looks attractive, successful and we like them, based on that we also think about them that they are intelligent, generous and plausible also.

there is an explationation of this on a site called crash   course world history 1

i would think yes.

explanation:

because we have every natianlity in our country which makes us so diverse and unique. that's why in a lot of cities there are places like little italy, koreatown, chinatown.