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Approximate Minimum Total CC Licensed Works as of July 2008: ~130 million

Metrics Updated.png

The Metrics Portal is about gathering, processing and visualizing metrics about Creative Commons' related projects, with particular emphasis on the adoption and usage of Creative Commons licenses internationally. Join us!

The best place to communicate on this is through the cc-community mailing list for general discussion, cc-devel for technical discussion, and the #cc chat channel on If really deep into this, please consider joining into the commons-research community. Join in the fun!

Research and Presentations

Juris-Ranking-Comparison WebVersion.jpg Chart of Global CC adoption and licensing permissiveness. Courtesy the Participatory Media Lab -- more visualizations available here and an explanation of this chart here.

  • Giorgos Cheliotis and the researchers at the Participatory Media Lab based at Singapore Management Univerity have been tracking and analyzing the development of Creative Commons worldwide. His 2007 TRPC paper "Taking Stock of the Creative Commons Experiment," is available here. The Lab's research wiki is a great resource for some of the latest research on CC adoption.

Upcoming Events

Aggregate web pages licensed

License statistics has basic information about linkback/page/search-engine-query-based license adoption statistics, as well as the code used to gather this data and dumps of the data itself.

Site-specific metrics

Content Directories lists licensed works counts for many sites that collect CC-licensed works, e.g., about 69 million at Flickr.

Counts for selected top sites over time may be found on the license statistics page.

Eventually code above should be expanded to collect this and finer-grained information (e.g., per site license breakdown) from these sites.

Quantitative metrics being prepared by Ankit as part of Summer of Code 2008

By the end of the summer, we hope to have a number of quantitative data from Ankit's Summer of Code 2008 project of analyzing our web server logs. These will hopefully include:

  • Historical data on license choices at the "License your work" CC license chooser
  • Indications based on referrers to our image icons to see if people change the license on web pages or other licensed documents
  • Indications based on image icon loading frequency as to which licenses are used by content widely seen by users
  • Analysis of logs to see what sorts of licenses and items people search for - and if that has changed over time
  • Analysis of license deeds to see if deed information affects choices in /license/
  • Geographic sub-analysis of the above
  • Code to reproducibly and consistently generate the above statistics.

Follow updates on ccLabs.

Other quantitative metrics

Qualitative metrics

  • Case Studies
  • Awards Received (grammys, oscars, etc)
  • "bestsellers" for some definition of best-seller from Books
  • Add ideas here...


Creative Commons Data

Other Datasets

  • Any other data sets? Add them here...


Numbers Explanation

The Approximate Minimum Total CC Licensed Works is based on licenses reported by Yahoo search queries and Flickr and is the minimum number of licensed works that would satisfy the distribution of license types across both of them. See the estimation code.