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Comment on Using Foursquare to Detect Tax Evasion / Money Laundering

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A good exercise, but nothing beyond that. Too many factors based on assumption. Also repeat visitors tend to skip continued the check-ins after the novelty of it wears down (unless there are extremely good reward offers associated with number of check-ins).

As long as the "repeat visitors" pattern is the same across business categories, it wouldn't add noise. There are always first-time visitors.

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