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Downvoted you for picking one sentence in the abstract that misrepresents the whole set of conclusions when taken in isolation.
HNers who are going to the comments first, please read at least the abstract to get a sense for the nuanced results. Example:
The results provide evidence of a significant bias in the killing of unarmed black Americans relative to unarmed white Americans, in that the probability of being {black, unarmed, and shot by police} is about 3.49 times the probability of being {white, unarmed, and shot by police} on average.