While this concern sounds right, after thinking about it I think it is not much of a problem because:
1: By observation, I noticed that articles tend to only gather positive reactions during the first 4 days of posting
2: Even if that would not be the case, if we assume that the pattern had not changed in three years, then there are no problems giving more weight to older posts.
Those two assumptions do not seem very far-fetched.
And again, if we assume old post = more likes, we can always do the same heatmap with a median, which gives almost the same results.
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Really nice article.
A question though, shouldn't it include the age of articles in the factors to check?
Not sure it has a big impact but an older article would potentially get more likes than a recent one.
A valid concern.
While this concern sounds right, after thinking about it I think it is not much of a problem because:
1: By observation, I noticed that articles tend to only gather positive reactions during the first 4 days of posting
2: Even if that would not be the case, if we assume that the pattern had not changed in three years, then there are no problems giving more weight to older posts.
Those two assumptions do not seem very far-fetched.
And again, if we assume old post = more likes, we can always do the same heatmap with a median, which gives almost the same results.