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This, I think, is the move to https links, where all the links which point to SE were silently edited in the background from http to https. For example, https://math.stackexchange.com/posts/29797/revisions, which points out to the date in question being April 13, 2017.


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As mentioned in comments, I made a Data.SE query that gave the cumulative distribution of users by reputation. However, we're interested in the distribution (not cumulative). So, I wrote a quick program in Python (or, at least, it would have been quick if I knew how to use the scipy toolkit before this) to compute the "derivative" of this CDF. The ...


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Interesting. Moderators have access to certain analytical data not present in the 25K site analytics (25K only). Part of this is up-/down-vote data on questions (and answers). Below is a graph showing the sliding seven-day average of up-/down-votes on questions. So, yes, there is an uptick for the last several days. This is coupled with a plateau (or slight ...


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The "people reached" is calculated as sum of views of non-deleted questions-threads to which you contributed a 'significant' post, where significant means (I think this is still current We're working on a new stat to help convey the reach of your posts here ): asked the question gave a 'significant' answer, meaning that it has a positive score (...


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TL;DR: the longer, the better. Based on the current data, longer questions tend to get a higher ratio of upvotes than shorter questions. There is not enough data to determine an 'optimal' question length. Full version I constructed a SEDE query which lets you play a bit with the interval length, and the maximum considered length. Feel free to fork it to ...


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Those who have served as site moderators Katie Banks (appointed moderator pro tempore, August 2010—December 2010) Larry Wang (appointed moderator pro tempore, August 2010—December 2010) Isaac (appointed moderator pro tempore, August 2010—December 2010) KennyTM (appointed moderator pro tempore, August 2010—December 2010) Robin Chapman ...


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Naturally, as the site grows, the number of votes of either kind goes up. The trend is shown below: upvotes per day in blue, 10*downvotes per day in red. (Multiplied by 10 to be roughly on the same scale). As you can see, recently the number of downvotes reached 10% of the number of upvotes. For better readability, open the image in another tab. The time ...


31

I considered the distribution of (question)-(1st answer) time interval among the questions that received at least one answer. There are about 186600 of such questions in the SEDE database, approximately 87% of all questions. (Thus, multiplying the percentages below by 0.87 will give the percentage among all existing questions.) Executive summary of results: ...


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Is this really happening or is it just me who feels that? In relative terms, yes, this effect is real. However, it is not that users stopped voting. In absolute terms more votes are cast. The issue is that the increase in votes is not as strong as the increase in posts. It is a recurring theme that towards the beginning of September as courses restart ...


28

Sometimes I want to ask a question, but I am afraid that not many users are active in the moment. That's a valid concern, but the other side of the coin is that there a not many users who are posting questions at that moment. So the users who are active have more chance to view your question. It turns out that on average, both effect cancel each other out. ...


27

I think that you suffer from a case of specialist's myopia. As I may have also been diagnosed with it let me elaborate. The calculus (or elementary number theory, not to mention high school level stuff) questions get a lot of attention in comparison to more specialized tags simply because there are more users A) understanding what the question is about, ...


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As proposed in my comment, I ran this query on data.SE: http://data.stackexchange.com/mathematics/query/87290/post-reputation-over-time This bears out that there has been a recent drop by half a vote per answer in the last two months from 3 to 2,5. Clearly, old posts are sometimes upvoted later on, but based on my own reputation, I estimate late votes to ...


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Update. The original version of the answer did not take acceptances into account. Definition 1. An answer is unappreciated if it is not accepted, not commented upon, and has the score of 0. Some answers are deservedly unappreciated; this aspect is beyond the score of this study. Site-wide count: out of 334392 answers currently in the database, 32471 are ...


24

The efficacy is not accurately measured by the size of the Unanswered category. Yes, there are about 48K questions there, but only 34K actually have no answers. The rest have at least one answer, which in many cases fully deserves an upvote, but does not have one yet. And among the questions with no answers at all many received helpful comments; ...


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As already mentioned in the comments, the 1000000th question will change over time. For example, depending on deletions/undeletions, migrations here/away etc. It also depends on your definition - do you want to count closed question? Do you want to order the posts by id or by CreationDate? (This can make a difference for migrated question, for example the ...


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It's not really that valuable (to you) to worry about "the site" being "overloaded". What's more important to you is how many people are watching the major tags of your question, pde in this case, and how busy that tag is. That is, what you'd really care about is whether the pde tag is "overloaded". What do you care if there are 1001 unanswered pre-calculus ...


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Alrighty, looks like I've got the query down. I don't remember exactly where the quarter cutoffs are, but you can modify it easy enough. This puppy just takes all answers from September 1 and on. SELECT count(p.Id) FROM Posts p WHERE p.creationDate > '2013-09-01 00:00:00' AND p.PostTypeId = 2 AND p.OwnerUserId IN (SELECT Top 100 Id FROM Users ...


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I do not consider this to be an issue. Mathematics is a Q&A site which just so happens to have an archive. However I use the archive in TeX, for example, more often than I would be willing to admit, and I think that this is where the high traffic is coming from. I think a greater use of the archives of other sites is because it is easier to ask a Linear ...


20

Regarding statistics, there is an Unanswered Tracker bot that posts in the Crusade of Answers chatroom that indicates that the number of unanswered questions on this site increases by about 200 everyday (except Saturdays). Looking at this page, about 77% of all questions on MathSE have been answered.


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According to this page, here are some of the questions with the greatest number of deleted answers, and with only $0$ or $1$ answer: Apparently, How does one prove the matrix inequality $\det\left(6(A^3+B^3+C^3)+I_{n}\right)\ge 5^n\det(A^2+B^2+C^2)$? is the winner, and Does there exist a bijection of $\mathbb{R}^n$ with itself such that the forward map is ...


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I'm not sure how to do the relevant analysis you asked for (given that it requires data from multiple sites), but I wrote a nice little query for voter reputation here. The data there's not real time (per Asaf's comment, it's presumably from ~7:00 AM UTC, Sunday), but at the moment, the reputation distribution looks as follows (which is a plot of the data $\...


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I believe that this Data Explorer query answers your question: "Home site" of election voters. The SQL is monstrous, but it basically just looks at voters in the election and identifies which site they have the highest reputation on. (I'm not sure how it behaves when it comes to picking a site when a user has the same, highest rep on two sites, but that's an ...


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