"I have been fielding requests for artists as diverse as Andy Warhol, Damien Hirst, Takashi Murakami, Richard Prince, Roy Lichtenstein, Alberto Giacometti and Pablo Picasso, among many others, " Simunovic said.
RoyRichard Grinker, a cultural anthropologist at George Washington University and one of the co-authors of the study, said he thinks the study's estimates are "surprising" but he doesn't think they are alarming.