The National Arts Index is intended to function much like stock
indexes. By its measure, the recent, recession-strapped years have
seen big declines not just in nonprofit arts but pop concerts and
movies as well.
[...]
Billed as 'the largest data set ever assembled describing arts and
culture in America,' the National Arts Index released Monday by the
advocacy group Americans for the Arts aims to capture in a single
number how the arts and entertainment sector has been doing - much as
the Dow Jones and S&P indices do for stocks. The news is not good.
<http://www.latimes.com/entertainment/news/la-et-0124-arts-index-20110124,0,3313531.story>Link