http://tags.library.upenn.edu/tag/opera+arts PennTags Feed http://tags.library.upenn.edu/makerecord/url/21982 http://tags.library.upenn.edu/makerecord/url/21982 Two reports on trends in the arts include The Perfoming Arts in a New Era and Arts and Culture in the Metropolis. Both are available as full text PDFs on the RAND site.