When I received a copy of this research report in the mail, I was astonished by its heft: 140 pages of charts, graphs, and their explanations! These are preceded by an introduction by Dana Gioia, former chairperson of the National Endowment for the Arts, and brief summaries of ten key findings. This last section has provided good headlines for a few stories in the general press, like, “Nearly two million Americans are artists,” or, “Women...