Google Scholar Metrics?

I wonder why Google Scholar has not implemented some metrics of scientific productivity equivalent to the popular ISI impact factor, which is used by most institutions and funding agencies to measure the qualifications of researchers. There are many problems with the impact factor, one of them being that it covers about 10% of published work. Google Scholar has a much broader database (although some of it needs polishing, since data was harvested automatically), and it would be great if they could implement at least some of these 39 measures. Well, scHolar index already does some...

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