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But there is no input from the campaigns about how they choose their spending. I might guess they do their a/b testing and keep the ads that engage users more.

But there is no input from the campaigns about how they choose their spending. I might guess they do their a/b testing and keep the ads that engage users more. this might be indicative of each candidate's audience. Assuming that this is true Sanders seems to be having the widest reach, judging from how close m/f ratio is to 50%

ricefield 7y ago
From the article: "Facebook allows you to select the location, age range, gender and ‘interests’ of your audience. Only people that fall into your target audience will see the sponsored ad. Specifying ‘interests’ indirectly affects the distribution of age, gender and location."