Is there a standard metric of overlap between two ranked lists?
e.g. to measure/score the similarity between top 10 keywords extracted
using 2 different formulae, such as LL v MI?
OR e.g. to measure/score the similarity between top 10 hits from Google v top 10 hits from Bing for a give search phrase?
OR e.g. to measure/score the similarity between ranked lists of PoS-tags
predicted for a word by two rival PoS-taggers in an ensemble tagger?

If these were unranked sets of keywords, i could simply count the
intersection. But I want to take rank into account in some senible way.

thanks for expert pointers to proven metrics ...

Eric Atwell, Asst Prof, Language@Leeds and Artificial Intelligence groups,
School of Computing, University of Leeds, Times University of the Year 2017

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