Seriously, though, why was this study not done on purely socioeconomic lines? Then you might have something vaguely interesting. Breaking it down along racial barriers is just misleading and subtly (*gasp* darest I say it?) racist.
Besides, as Viking mentioned, there's also the racial subcultures to consider. Not that all blacks, hispanics or whites can be placed in one subculture, but there is definitely a strong subculture among poor and/or minority populations that encourages such consumption. Now, I won't get into how this was created, lest I be accused of being a pinko hippie liberal douche who is ragging on my fellow white man and/or ever-glorious consumerist capitalism, but let's just say that we would all be better off without these subcultures.
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