Hello Piotr, I believe that in Chinese Wikipedia, "blocked indefinitely" is a user category called Wikipedians that are blocked indefinitely "被永 久封禁的維基人" http://zh.wikipedia.org/wiki/Category:%E8%A2%AB%E6%B0%B8%E4%B9%85%E5%B0%81%… Its equivalent Wikidata table has the following pages in other language versions: http://www.wikidata.org/wiki/Q4616402#sitelinks-wikipedia Language Code Linked article English enwiki Category:Blocked historical users <http://en.wikipedia.org/wiki/Category:Blocked_historical_users> italiano itwiki Categoria:Wikipedia:Cloni sospetti <http://it.wikipedia.org/wiki/Categoria:Wikipedia:Cloni_sospetti> latviešu lvwiki Kategorija:Uz nenoteiktu laiku nobloķētie lietotāji <http://lv.wikipedia.org/wiki/Kategorija:Uz_nenoteiktu_laiku_noblo%C4%B7%C4%93tie_lietot%C4%81ji> slovenčina skwiki Kategória:Wikipédia:Natrvalo zablokovaní používatelia <http://sk.wikipedia.org/wiki/Kateg%C3%B3ria:Wikip%C3%A9dia:Natrvalo_zablokovan%C3%AD_pou%C5%BE%C3%ADvatelia> česky cswiki Kategorie:Wikipedie:Natrvalo zablokovaní uživatelé <http://cs.wikipedia.org/wiki/Kategorie:Wikipedie:Natrvalo_zablokovan%C3%AD_u%C5%BEivatel%C3%A9> български bgwiki Категория:Блокирани неприемливи потребителски имена <http://bg.wikipedia.org/wiki/%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D1%8F:%D0%91%D0%BB%D0%BE%D0%BA%D0%B8%D1%80%D0%B0%D0%BD%D0%B8_%D0%BD%D0%B5%D0%BF%D1%80%D0%B8%D0%B5%D0%BC%D0%BB%D0%B8%D0%B2%D0%B8_%D0%BF%D0%BE%D1%82%D1%80%D0%B5%D0%B1%D0%B8%D1%82%D0%B5%D0%BB%D1%81%D0%BA%D0%B8_%D0%B8%D0%BC%D0%B5%D0%BD%D0%B0> олык марий mhrwiki Категорий:Википедий:Йӧн петырыме <http://mhr.wikipedia.org/wiki/%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D0%B8%D0%B9:%D0%92%D0%B8%D0%BA%D0%B8%D0%BF%D0%B5%D0%B4%D0%B8%D0%B9:%D0%99%D3%A7%D0%BD_%D0%BF%D0%B5%D1%82%D1%8B%D1%80%D1%8B%D0%BC%D0%B5> українська ukwiki Категорія:Безстроково заблоковані користувачі <http://uk.wikipedia.org/wiki/%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%D1%80%D1%96%D1%8F:%D0%91%D0%B5%D0%B7%D1%81%D1%82%D1%80%D0%BE%D0%BA%D0%BE%D0%B2%D0%BE_%D0%B7%D0%B0%D0%B1%D0%BB%D0%BE%D0%BA%D0%BE%D0%B2%D0%B0%D0%BD%D1%96_%D0%BA%D0%BE%D1%80%D0%B8%D1%81%D1%82%D1%83%D0%B2%D0%B0%D1%87%D1%96> 中文 zhwiki Category:被永久封禁的維基人 <http://zh.wikipedia.org/wiki/Category:%E8%A2%AB%E6%B0%B8%E4%B9%85%E5%B0%81%E7%A6%81%E7%9A%84%E7%B6%AD%E5%9F%BA%E4%BA%BA> 日本語 jawiki Category:無期限ブロックを受けたユー ザー <http://ja.wikipedia.org/wiki/Category:%E7%84%A1%E6%9C%9F%E9%99%90%E3%83%96%E3%83%AD%E3%83%83%E3%82%AF%E3%82%92%E5%8F%97%E3%81%91%E3%81%9F%E3%83%A6%E3%83%BC%E3%82%B6%E3%83%BC> I hope that it helps. Best, han-teng liao 2013/9/29 Piotr Konieczny &lt;piokon(a)post.pl <mailto:piokon@post.pl>> Hi everyone, Another question: do we have an estimate of a vandal population? I also asked this at https://en.wikipedia.org/wiki/Wikipedia:Village_pump_%28technical%29#How_ma… but so far no good estimates have been provided. -- Piotr Konieczny, PhD http://hanyang.academia.edu/PiotrKonieczny http://scholar.google.com/citations?user=gdV8_AEAAAAJ http://en.wikipedia.org/wiki/User:Piotrus _______________________________________________ Wiki-research-l mailing list Wiki-research-l(a)lists.wikimedia.org <mailto:Wiki-research-l@lists.wikimedia.org> https://lists.wikimedia.org/mailman/listinfo/wiki-research-l _______________________________________________ Wiki-research-l mailing list Wiki-research-l(a)lists.wikimedia.org <mailto:Wiki-research-l@lists.wikimedia.org> https://lists.wikimedia.org/mailman/listinfo/wiki-research-l

Hi everyone, Another question: do we have an estimate of a vandal population? I also asked this at https://en.wikipedia.org/wiki/Wikipedia:Village_pump_%28technical%29#How_ma… but so far no good estimates have been provided. -- Piotr Konieczny, PhD http://hanyang.academia.edu/PiotrKonieczny http://scholar.google.com/citations?user=gdV8_AEAAAAJ http://en.wikipedia.org/wiki/User:Piotrus _______________________________________________ Wiki-research-l mailing list Wiki-research-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l

I know of the categories, but the problem is that they do not seem to be comprehensive. I can estimate, based on them, that there are at least 150k or so editors who were banned for vandalism, but it seems many vandals do not make it into those categories, suggesting this number is underestimated. Still, we should be able to get some estimates. We know, for example, that something like 5 or 6 million of accounts have made 1+ edit on English Wikipedia. How many of them were indefinitely blocked? This should give us some idea. Alternatively, we know how many accounts make an edit to Wikipedia every given timeframe. About 100,000-120,000 editors make at least one edit to Wikipedia each month. If we knew how many are indef blocked in that period, that would be another useful estimate. -- Piotr Konieczny, PhDhttp://hanyang.academia.edu/PiotrKoniecznyhttp://scholar.google.com/cita… On 9/30/2013 11:44 AM, Stuart Yeates wrote: I guess it depends on whether Piotr is looking for an estimate of accounts used for vandalism or an estimate of the people who operate them. One seems straight forward, the other more challenging. Perhaps combining the categories below with sock puppet investigations and some fancy stats? Cheers Stuart On 29/09/2013, at 12:13 am, h &lt;hanteng(a)gmail.com&gt; wrote: Hello Piotr, I believe that in Chinese Wikipedia, "blocked indefinitely" is a user category called Wikipedians that are blocked indefinitely "被永久封禁的維基人" http://zh.wikipedia.org/wiki/Category:%E8%A2%AB%E6%B0%B8%E4%B9%85%E5%B0%81%… Its equivalent Wikidata table has the following pages in other language versions: http://www.wikidata.org/wiki/Q4616402#sitelinks-wikipedia Language Code Linked article English enwiki Category:Blocked historical users<http://en.wikipedia.org/wiki/Category:Blocked_historical_users> italiano itwiki Categoria:Wikipedia:Cloni sospetti<http://it.wikipedia.org/wiki/Categoria:Wikipedia:Cloni_sospetti… latviešu lvwiki Kategorija:Uz nenoteiktu laiku nobloķētie lietotāji<http://lv.wikipedia.org/wiki/Kategorija:Uz_nenoteiktu_laiku_no… slovenčina skwiki Kategória:Wikipédia:Natrvalo zablokovaní používatelia<http://sk.wikipedia.org/wiki/Kateg%C3%B3ria:Wikip%C3%A9dia:… česky cswiki Kategorie:Wikipedie:Natrvalo zablokovaní uživatelé<http://cs.wikipedia.org/wiki/Kategorie:Wikipedie:Natrvalo_zabl… български bgwiki Категория:Блокирани неприемливи потребителски имена<http://bg.wikipedia.org/wiki/%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0%BE%… олык марий mhrwiki Категорий:Википедий:Йӧн петырыме<http://mhr.wikipedia.org/wiki/%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%D0… українська ukwiki Категорія:Безстроково заблоковані користувачі<http://uk.wikipedia.org/wiki/%D0%9A%D0%B0%D1%82%D0%B5%D0%B3%… 中文 zhwiki Category:被永久封禁的維基人<http://zh.wikipedia.org/wiki/Category:%E8%A2%AB%E6%B0… 日本語 jawiki Category:無期限ブロックを受けたユー ザー<http://ja.wikipedia.org/wiki/Category:%E7%84%A1%E6%9C%9F%E9%99%90%E3%… I hope that it helps. Best, han-teng liao 2013/9/29 Piotr Konieczny &lt;piokon(a)post.pl&gt; _______________________________________________ Wiki-research-l mailing list Wiki-research-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l _______________________________________________ Wiki-research-l mailing listWiki-research-l@lists.wikimedia.orghttps://lists.wikimedia.org/mailman/listinfo/wiki-research-l _______________________________________________ Wiki-research-l mailing list Wiki-research-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l