Mean Expertise Contribution (MEC) in a tag

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Amateur Radio

Q&A for amateur radio enthusiasts

-- http://yangjiera.github.io/home/works/umap2014_experts.pdf

with answers as (
  select a.OwnerUserId UserId,
         1.0/rank() over (partition by q.Id order by a.Score desc) utility,
         count(a.Id) over (partition by q.Id) debatableness
  from Posts q
       join Posts a on q.Id = a.ParentId
       join PostTags on q.Id = PostId
       join Tags t on TagId = t.Id
  where TagName = '##tag##' --and q.Id = 9929585
)

select UserId as [User Link],
       avg(utility) AU, 
       avg(debatableness) D,
       count(*)
from answers
group by UserId
order by avg(debatableness) desc

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