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Their use of the word significantly in this context does not refer to statistical significance. The percentages you are referring too are just basic metrics ba

Their use of the word significantly in this context does not refer to statistical significance. The percentages you are referring too are just basic metrics based on the last years data, not something that was t-tested. The longer time period changes the starting index, it doesn't really make this type of analysis more or or less statistically significant. As the author alluded, this could mean that economic mechanisms close this gap over time when it appears, or it could be a recent effect. Your criticism isn't really valid.

IncRnd 8y ago
You are making a statement about statistics that isn't correct. Statistics is collecting and analyzing numerical data, which is what this article does. That is a truth, regardless of it being a different sort of analysis than what you believe to be the only model of statistics. That is also orthogonal to what I wrote, which you seemed to intentionally misunderstand in order for you to argue.